I am looking for book recommendations to use with a group of 4th/5th grade boys who are reading far below grade level. Although I'm not yet sure of their DRA/lexile levels, I do know a good fit book is Frog and Toad. Series such as Magic Treehouse & A to Z Mysteries are still very challenging. These guys love nonfiction, but even fiction that isn't babyish would be great. I've searched in the school and public library and online, but it seems like there is nothing out there at this level! There's tons of early/easy reader books, but the content is geared towards 1/2 graders and the guys feel stupid reading them. Can anyone help with some titles?