Boys in fourth and fifth grade were interviewed and here are the books, series, and authors they like:

Michigan and American Chillers
Diary of a Wimpy Kid
Mike Lupica books
Roald Dahl books
Origami Yoda series
Andrew Clements books
Myth-o-Mania series
Percy Jackson series
Harry Potter series
Nonfiction books
Graphic Novels
Lemony Snicket series
Scary stories
Gordon Korman books
Guys Read series
I Survived Series
Amulet Graphic Novels