| Tarzan of the apes | 53 |
| The Return of Tarzan | 50 |
| The Son of Tarzan | 41 |
| Tarzan and the Jewels of Opar | 35 |
| Jungle Tales of Tarzan | 35 |
| Tarzan the Untamed | 34 |
| A princess of Mars | 34 |
| Tarzan the Terrible | 32 |
| Thuvia, Maid of Mars | 32 |
| The Chessmen of Mars | 31 |
| The Beasts of Tarzan | 29 |
| The Gods of Mars | 28 |
| The Outlaw of Torn | 27 |
| The Warlord of Mars | 26 |
| The Mucker | 25 |
| Pellucidar | 23 |
| At the Earth's Core | 22 |
| Out of Time's Abyss | 22 |
| The Monster Men | 22 |
| The land that time forgot | 21 |
| The Mad King | 21 |
| The Oakdale Affair | 17 |
| The Lost Continent | 17 |
| The People That Time Forgot | 16 |
| The Cave Girl | 14 |
| The Efficiency Expert | 12 |
| Master Mind of Mars | 11 |
| Swords of Mars | 11 |
| A fighting man of Mars | 10 |
| Escape on Venus | 10 |
| Tarzan of the Apes (Tarzan) | 10 |
| Pirates of Venus. | 10 |
| Tarzan and the ant men | 10 |
| Lost on Venus | 9 |
| Tarzan | 9 |
| Carson of Venus. | 9 |
| Tarzan and the Golden Lion | 9 |
| The Moon Maid | 9 |
| Synthetic men of Mars. | 9 |
| Tarzan and the lost empire | 9 |
| John Carter of Mars. | 8 |
| Tarzan and the City of Gold | 8 |
| Tarzan, lord of the jungle | 8 |
| Tarzan and the Foreign Legion | 8 |
| Tarzan the invincible | 8 |
| Tarzan the magnificent | 8 |
| Llana of Gathol | 8 |
| The Gods of Mars (Martian Tales of Edgar Rice Burroughs) | 8 |
| The Eternal Savage | 8 |
| Tarzan and the madman. | 7 |
| Moon Men | 7 |
| Land of terror | 7 |
| Tarzan and the Castaways | 7 |
| Tarzan at the Earth's Core | 7 |
| Tanar of Pellucidar | 7 |
| The War Chief | 7 |
| Tarzan and the forbidden city. | 6 |
| Savage Pellucidar | 6 |
| Apache Devil | 6 |
| Tarzan's Quest | 6 |