Series with no new volumes added after 1924
Number of Copies Sold
Series Vols. Royalty 1925 1926 1927 1928 1929
Motor Boys * 1-22 5c 29,310 25,609 20,280 15,067 53,021
Jack Ranger 1-6 5c 4,125 3,475 3,430 2,032 1,437
College Sports 1-6 5c 7,606 6,786 6,388 4,653 3,093
Dorothy Dale 1-13 5c 14,456 11,670 8,676 4,260 ??
Webster Series 1-25 2c 87,355 96,211 90,593 73,089 45,732
Dave Dashaway 1-5 2c 7,136 7,141 7,607 14,966 22,873
Speedwell Boys 1-5 2c 7,102 7,746 7,108 5,622 3,346
Saddle Boys 1-5 2c 13,014 13,453 12,912 9,197 7,283
Tom Fairfield 1-5 2c 7,306 7,964 5,575 3,943 3,342
Fred Fenton 1-5 2c 8,768 8,370 5,366 3,485 2,621
Four Boy Hunters 1-4 5c 2,783 2,677 2,503 1,768 1,439
* Motor Boys reduced to 50c with a 2c royalty for 12 volumes in 1929

Series with volumes added after 1924

Number of Copies Sold
Series Vols. Royalty 1925 1926 1927 1928 1929
Baseball Joe 1-11 5c 29,596 23,332 21,321 49,645 44,037
12-Champion of the League 12 2c 3,695 2,264 1,781 4,218 3,486
13-Club Owner 13 2c -- 3,352 2,066 4,068 3,547
14-Pitching Wizard 14 2c -- -- -- 7,577 4,420
33,291 28,948 25,168 65,508 55,490
Great Marvel 1-6 5c 10,860 11,223 14,958 11,400 10,432
7-City Beyond the Clouds 7 5c 1,745 1,919 1,888 1,991 1,673
8-By Air Express to Venus 8 5c -- -- -- -- 2,220
12,605 13,142 16,846 13,391 14,325
Ruth Fielding 1-25 2c 117,073 109,886 127,756 123,374 121,803
21-at Golden Pass 21 2c 7,678 6,632 6,799 6,000 5,758
22-in Alaska 22 2c -- 8,628 7,290 6,091 5,307
23-and Her Great Scenario 23 2c -- -- 9,376 6,605 5,485
24-at Cameron Hall 24 2c -- -- -- 8,931 8,052
25-Clearing Her Name 25 2c -- -- -- -- 10,166
124,751 125,146 151,221 151,001 156,571
Betty Gordon 1-7 2c 36,158 29,025 35,754 37,527 37,890
8-at Rainbow Ranch 8 2c 4,526 3,696 4,816 5,252 4,765
9-in Mexican Wilds 9 2c -- 4,326 4,579 4,776 4,791
10-and the Lost Pearls 10 2c -- -- 5,504 5,275 5,204
11-on the Campus 11 2c -- -- -- 5,481 5,282
12-and the Hale Twins 12 2c -- -- -- -- 5,906
40,684 37,047 50,653 58,311 63,838
Ralph of the Railroad 1-7 2c 29,990 40,864 33,600 26,082 15,957
8-and the Missing Mail Pouch 8 2c 4,069 4,649 4,788 3,604 2,294
9-on the Mountain Division 9 2c -- -- 5,606 3,398 2,146
10-and the Train Wreckers 10 2c -- -- -- 4,517 2,599
34,059 45,513 43,994 37,601 22,996
Tom Swift 1-27 2c 440,056 469,930 480,530 436,354 352,933
28-and His Chest of Secrets 28 2c 33,356 30,450 21,298 18,813 15,762
29-and His Airline Express 29 2c -- 37,645 24,294 20,283 16,154
30-Circling the Globe 30 2c -- -- 38,512 25,734 18,555
31-and His Talking Pictures 31 2c -- -- -- 40,216 19,224
32-and His House on Wheels 32 2c -- -- -- -- 38,080
473,412 538,025 564,634 541,400 460,708
Outdoor Girls 1-14 2c 71,035 56,882 85,585 95,207 84,630
15-at Foaming Falls 15 2c 7,677 6,062 6,467 6,588 6,332
16-Along the Coast 16 2c -- 7,583 7,166 6,814 6,516
17-at Spring Hill Farm 17 2c -- -- 11,056 8,336 6,967
18-at New Moon Ranch 18 2c -- -- -- 13,876 7,881
19-on a Hike 19 2c -- -- -- -- 9,489
78,712 70,527 110,274 130,821 121,815
Bobbsey Twins 1-17 2c 316,290 305,118 315,120 322,381 313,422
18-Keeping House 18 2c 29,355 19,886 19,354 19,203 18,928
19-at Cloverbank 19 2c -- 39,189 16,860 15,193 14,188
20-at Cherry Corners 20 2c -- -- 35,542 20,849 17,963
21-and Their Schoolmates 21 2c -- -- -- 31,809 20,053
22-Treasure Hunting 22 2c -- -- -- -- 25,059
345,645 364,193 386,876 409,435 409,613
Bunny Brown 1-14 2c 143,939 134,754 130,573 119,413 107,227
15-on the Rolling Ocean 15 2c 14,660 9,111 8,568 8,169 6,919
16-on Jack Frost Island 16 2c -- -- 13,847 9,348 7,094
17-at Shore Acres 17 2c -- -- -- 12,438 6,812
18-at Berry Hill 18 2c -- -- -- -- 11,899
158,599 143,865 152,988 149,368 139,951
Six Little Bunkers 1-10 2c 47,302 43,049 39,077 36,645 30,412
11-at Indian John's 11 2c 6,114 5,242 3,858 3,539 2,846
12-at Happy Jim's 12 2c -- -- -- 4,104 2,796
13-at Skipper Bob's 13 2c -- -- -- -- 4,360
53,416 48,291 42,935 44,288 40,414
Radio Boys 1-7 2c 70,197 60,451 49,101 34,737 21,436
8-with the Flood Fighters 8 2c 14,980 10,277 7,105 4,730 2,851
9-on Signal Island 9 2c -- 10,328 7,248 4,804 2,798
10-in Gold Valley 10 2c -- -- 11,623 5,360 3,364
11-Aiding the Snowbound 11 2c -- -- -- 9,090 3,069
12-on the Pacific 12 2c -- -- -- -- 3,959
85,177 81,056 75,077 58,721 37,477
Honey Bunch 1-5 2c 60,824 99,739 75,838 77,497 76,235
6-Days in Camp 6 2c 13,912 14,051 12,988 12,939 12,984
7-Auto Tour 7 2c -- 16,789 11,699 12,561 12,664
8-Trip on the Ocean 8 2c -- -- 18,486 13,597 13,112
9-Trip West 9 2c -- -- -- 19,353 13,235
10-Summer on an Island 10 2c -- -- -- -- 19,341
74,736 130,579 119,011 135,947 147,571
Amy Bell Marlowe 1-8 2c 8,011 5,231 30,401 25,652 23,049
9-When Oriole Traveled Westward 9 2c 965 652 3,570 2,808 2,597
10-When Oriole Went to Boarding School 10 2c -- -- 4,172 3,306 3,311
** Royalty reduced to 2c. 8,976 5,883 38,143 31,766 28,957
Curlytops 1-9 2c 47,003 54,739 50,316 49,154 43,536
10-Touring Around 10 2c 4,970 5,082 5,056 4,898 4,166
11-in a Summer Camp 11 2c -- -- 5,915 4,804 4,281
12-Growing Up 12 2c -- -- -- 6,408 4,553
51,973 59,821 61,287 65,264 56,536
Billie Bradley 1-5 2c 14,152 15,549 15,696 12,902 19,233
6-at Treasure Cove 6 2c -- -- -- 3,847 3,650
7-at Sun Dial Lodge 7 2c -- -- -- -- 3,886
14,152 15,549 15,696 16,749 26,769
Four Little Blossoms 1-5 2c 9,402 9,580 9,059 13,124 14,681
6-at Sunrise Beach 6 2c -- -- -- -- 2,560
9,402 9,580 9,059 13,124 17,241
Bobby Blake 1-11 5c 10,351 9,812 4,497 4,895 3,282
12-on Mystery Mountain 12 2c -- 2,416 643 464 319
10,351 12,228 5,140 5,359 3,601
Corner House Girls 1-12 5c 13,586 12,274 10,442 7,654 5,291
13-Facing the World 13 2c -- 1,943 835 573 355
13,586 14,217 11,277 8,227 5,646
Sunny Boy 1-8 2c 26,828 27,856 24,763 26,054 30,885
9-on the Ocean 9 2c 3,808 2,862 2,733 2,742 3,620
10-with the Circus 10 2c -- 3,751 3,053 3,086 4,069
11-and His Big Dog 11 2c -- -- 3,675 3,020 3,980
12-in the Snow 12 2c -- -- -- 3,551 3,569
30,636 34,469 34,224 38,453 46,123
Rover Boys 30 5c 109,269 100,948 85,704 65,940 43,354
*** Includes new volumes in 1925 and 1926 109,269 100,948 85,704 65,940 43,354

Series with started after 1924

Number of Copies Sold
Series Vols. Royalty 1925 1926 1927 1928 1929
Don Sturdy
1-on the Desert of Mystery 1 2c 17,797 15,790 15,703 16,621 12,317
2-with the Big Snake Hunters 2 2c 16,521 14,438 14,264 13,337 10,991
3-in the Toombs of Gold 3 2c 13,681 12,439 14,168 12,884 10,885
4-Across the North Pole 4 2c 13,616 12,089 13,476 11,810 10,441
5-in the Land of Volcanoes 5 2c 13,411 11,556 12,600 11,326 9,840
6-in the Port of Lost Ships 6 2c -- 13,252 14,659 12,805 11,113
7-Among the Gorillas 7 2c -- -- 19,970 14,576 12,058
8-Captured by Head Hunters 8 2c -- -- -- 15,925 12,684
9-in Lion Land 9 2c -- -- -- -- 14,230
75,026 79,564 104,840 109,284 104,559
Blythe Girls
1-Helen, Margy and Rose 1 2c 12,778 10,343 8,140 8,553 6,733
2-Margy's Queer Inheritance 2 2c 11,720 9,228 7,117 6,328 5,894
3-Rose's Great Problem 3 2c 10,676 6,959 6,563 6,043 5,103
4-Helen's Strange Boarder 4 2c 10,107 7,233 6,469 5,541 5,454
5-Three on a Vacation 5 2c 9,688 7,443 6,647 5,610 5,537
6-Margy's Secret Mission 6 2c -- 10,919 6,222 5,604 5,436
7-Rose's Odd Discovery 7 2c -- -- 9,650 5,759 5,311
8-The Disappearance of Helen 8 2c -- -- -- 7,324 6,195
9-Snowbound in Camp 9 2c -- -- -- -- 9,763
54,969 52,125 50,808 50,762 55,426
Garry Grayson
1-Hill Street Eleven 1 2c -- 8,915 11,719 7,820 6,586
2-at Lennox High 2 2c -- 8,730 8,914 8,231 6,499
3-Football Rivals 3 2c -- 6,327 9,062 7,998 6,608
4-Showing His Speed 4 2c -- -- 8,861 7,858 6,257
5-at Stanley Prep 5 2c -- -- 8,686 8,026 6,323
6-Winning Kick 6 2c -- -- -- 8,971 7,013
7-Hitting the Line 7 2c -- -- -- -- 8,081
**** 1926 sales for 1/2 year only 0 23,972 47,242 48,904 47,367
X-Bar-X Boys
1-on the Ranch 1 2c -- 9,268 14,872 12,834 8,922
2-in Thunder Canyon 2 2c -- 9,034 12,783 11,431 8,610
3-on Whirlpool River 3 2c -- 6,576 9,747 10,447 7,871
4-on Big Bison Trail 4 2c -- -- 13,569 10,883 8,081
5-at the Round-Up 5 2c -- -- 14,065 11,279 8,301
6-at Nugget Camp 6 2c -- -- -- 14,689 8,387
7-at Rustler's Gap 7 2c -- -- -- -- 12,709
8-at Grizzly Pass 8 2c -- -- -- -- 6,097
**** 1926 sales for 1/2 year only 0 24,878 65,036 71,563 68,978
Ted Scott
1-Over the Ocean to Paris 1 2c -- -- 25,144 30,389 24,722
2-Rescued in the Clouds 2 2c -- -- 17,159 29,106 22,473
3-Over the Rockies with the Air Mail 3 2c -- -- 16,115 29,913 22,475
4-First Stop Honolulu 4 2c -- -- 12,745 29,885 17,153
5-The Search for the Lost Flyers 5 2c -- -- -- 7,893 21,858
6-South of the Rio Grande 6 2c -- -- -- 13,128 19,750
7-Across the Pacific 7 2c -- -- -- 12,199 19,056
8-The Lone Eagle of the Border 8 2c -- -- -- -- 25,204
9-Flying Against Time 9 2c -- -- -- -- 20,351
10-Over the Jungle Trails 10 2c -- -- -- -- 12,706
**** 1/2 year sales for volumes 1-4 in 1927, 5-7 in 1928, 10 in 1929 71,163 152,513 205,748
Hardy Boys
1-The Tower Treasure 1 2c -- -- 9,837 12,252 10,830
2-The House on the Cliff 2 2c -- -- 9,256 9,610 10,222
3-The Secret of the Old Mill 3 2c -- -- 9,154 9,555 10,022
4-The Missing Chums 4 2c -- -- -- 11,459 9,599
5-Hunting for Hidden Gold 5 2c -- -- -- 10,087 9,442
6-The Shore Road Mystery 6 2c -- -- -- 5,873 10,820
7-The Secret of the Caves 7 2c -- -- -- -- 11,064
8-The Mystery of Cabin Island 8 2c -- -- -- -- 7,691
**** 1/2 year sales for volumes 1-3 in 1927, 6 in 1928, 8 in 1928 28,247 58,836 79,690
Bob Chase
1-with the Big Moose Hunters 1 2c -- -- -- -- 2,185
2-After Grizzly Bears 2 2c -- -- -- -- 1,991
3-in the Tiger's Lair 3 2c -- -- -- -- 1,910
**** Sales for 1/2 year only 0 0 0 0 6,086
Lanky Lawson
1-the Boy from Nowhere 1 2c -- -- -- -- 3,013
2-with the One Ring Circus 2 2c -- -- -- -- 2,877
0 0 0 0 5,890
Roy Stover
1-The Lakeport Bank Mystery 1 2c -- -- -- -- 902
2-The Mystery of the Snowbound Express 2 2c -- -- -- -- 902
**** Sales for 1/2 year only 0 0 0 0 1,804