Indian in the Cupboard is a good one. Other books for this age level:
Get Ready for Second Grade, Amber Brown--Danziger
Matilda--Dahl
My Father's Dragon--Ruth Stiles Gannet
Any of the Cam Jansen books by David Adler
Any Nate the Great by Sharmat
Sarah, Plain and Tall by Patricia MacLachlan
Catwings by LeGuin
Charlotte's Web
Trumpet of the Swan
Stuart Little
Magic Tree House Series--(poorly written with fragments which make me want to pull my teaching hair out, but a real favorite w/the kids)
I don't know which of any of these are out in ebook, but there ya go.
