To find the numerical order of a book in a series...
Young Adult Books in Series and Sequels
Manga Collection
Fullmetal Alchemist
Hikaru No Go
Chibi Vampire
Blood+
Naruto
Rurouni Kenshin
Bleach
Death Note
One Piece
Scott Pilgrim
Yu-Gi-Oh!
Fruits Basket
Dragon Ball Z
Dragon Drive

Looking for something good to read? If you liked...
Twilight by Stephenie Meyer
Dead Beautiful Yvonne Woon
Shiver by Maggie Stiefvater
Blue Bloods by Melissa de la Cruz
House of Night by P.C. Cast
Vampire Academy by Richelle Mead
Vampire Diaries by L.J. Smith
Evernight by Claudia Gray
Chibi Vampire by Yuna Kagesaki
 
The Hunger Games by Suzanne Collins
The Unwanteds by Lisa McMann
Blood Red Road by Moira Young
Graceling by Kristin Cashore
Matched by Allyson Braithwaite
Variant by Robison E. Wells
Ship Breaker by Paolo Bacigalupi
Life as We Knew it by Susan Beth Pfeffer
The Declaration by Gemma Malley
Unwind by Neal Shusterman
Little Brother by Cory Doctorow
The House of the Scorpion
Uglies by Scott Westerfeld
How I Live Now by Meg Rosoff