| 100% | KANES | 5 | "___ War" (Nick Stone book series) |
| 54% | BOBA | 4 | "The Book of ___ Fett" (Disney+ series featuring "Star Wars" characters) |
| 50% | TIMELIFE | 8 | Source of many book series |
| 47% | OMEGA | 5 | J.D. Cameron book series |
| 47% | WHERES | 6 | "___ Waldo?" (children's book series) |
| 47% | WALDO | 5 | "Where's ___?" (kids' book series) |
| 47% | MONKANDROBOT | 12 | Becky Chambers' solarpunk book series |
| 46% | DUNE | 4 | Frank Herbert book series |
| 46% | ADOT | 4 | "Poke-___!" (kids' book series) |
| 46% | ISPY | 4 | Picture-riddle book series |
| 46% | TINY | 4 | "___ Titans" (comic book series) |
| 45% | ISPY | 4 | Book series with riddles by Jean Marzollo |
| 45% | CITY | 4 | Frank Miller book series "Sin ___" |
| 44% | SWEETVALLEYHIGH | 15 | Book series featuring teenagers Elizabeth and Jessica Wakefield |
| 44% | WALDO | 5 | "Where's ___?" (children's book series) |
| 44% | DUMMIES | 7 | "For ___" (popular how-to book series) |
| 44% | FORDUMMIES | 10 | Self-deprecatingly titled instructional book series |
| 44% | ADVENTURE | 9 | Interactive book series: Choose Your Own __ |
| 44% | NATE | 4 | Archibald of "Gossip Girl" book series |
| 44% | RLSTINE | 7 | Author of the "Goosebumps" book series |
| 44% | GHOSTLY | 7 | Mostly ___ (R.L. Stine book series) |
| 44% | TWILIGHT | 8 | Vampire book series by Stephenie Meyer |
| 44% | TWILIGHT | 8 | Popular book series by Stephenie Meyer |
| 44% | MATERIALS | 9 | His Dark __, Philip Pullman book series |
| 44% | TRILOGY | 7 | Three-part movie or book series |
| 44% | RUSE | 4 | Mark Waid detective comic book series |
| 44% | BONE | 4 | Comic book series by Jeff Smith |
| 44% | DARK | 4 | His __ Materials, Philip Pullman book series |
| 44% | SAGA | 4 | "The Twilight ___" (Stephenie Meyer book series) |
| 44% | ARNIE | 5 | "___ the Doughnut," children's book series |