There are definitely many options out there, from classics to newly-released reads. Here are some that came to my mind:
- Charlotte's Web by E.B. White
- A Wrinkle in Time by Madeleine L'Engle
- Matilda by Roald Dahl
- Where the Sidewalk Ends by Shel Silverstein
- The Lorax by Dr. Seuss
- Escape from Mr. Lemoncello's Library by Chris Grabenstein

Goodreads is also a good resource in choosing what to read. These links might be helpful:
- https://www.goodreads.com/list/show/86. ... en_s_Books
- https://www.goodreads.com/list/tag/children
- https://www.goodreads.com/genres/middle-grade
- https://www.goodreads.com/list/tag/middle-grade
Also, don't forget to check out this forum on OBC: Children's Books