Using the data from the unscientific poll of IFLS and PUBYAC librarians AND the more-scientific information from a list of series with books that have multiple holds on the MORE system, I have compiled a list of popular series for teens. There are many more titles with multiple holds in this group!
*#1 Twilight Saga
by Stephenie Meyer
9 votes (some didn’t think of this as a series because it isn’t ongoing)
#2 House of Night
by P.C. Cast
6 votes
*#3 Hunger Games
by Suzanne Collins
6 votes (some didn’t think of this as a series because it is a trilogy only)
*#4 Ranger’s Apprentice
by John Flannagan
5 votes
#5 Mortal Instruments
by Cassandra Clare
5 votes
*#6 Blue Bloods by Melissa De La Cruz, 4 votes
#7 Gossip Girl by Cecily Von Ziegesar, 4 votes
*#8 Vampire Academy by Richelle Mead, 3 votes
#9 Cirque du Freak by Darren Shan, 3 votes
#9 Naruto by Masashi Kishimoto, 3 votes
#11 Pretty Little Liars, 2 votes (but this series had the most holds on titles of any listed)
Receiving 2 votes:
*Vampire Kisses by Ellen Schreiber
*Clique by Lisi Harrison
*Maximum Ride by James Patterson
Bone by Jeff Smith
Carter House Girls by Melody Carlson
Diary of a Teenage Girl by Melody Carlson
Fablehaven by Brandon Mull, illustrated by Brandon Dorman
Fruits Basket by Natsuki Tayaka
Keys to the Kingdom by Garth Nix
On the Runway by Melody Carlson
Pendragon by D.J. MacHale
Uglies by Scott Westerfield
Receiving 1 vote, but also large number of holds:
*Daniel X by James Patterson
*Secrets of the Immortal Nicholas Flamel by Michael Scott
*Gallagher Girls by Ally Carter
*Strange Angels by Lili St. Crow
*Vampire Knight by Hino Matsuri
*Gone by Michael Grant
Receiving no votes, but large number of holds:
*Airhead by Meg Cabot
*Chronicles of Nick (Dark Hunter) by Sherrilyn Kenyon
*Darkest Powers by Kelly Armstrong
*Full Metal Alchemist by Hiromu Arakawa
*These series had between 11 and 240 holds placed on titles in the MORE system