Some popular books suitable for 8 year olds include:
1. "Charlotte's Web" by E.B. White
2. "The Magic Tree House" series by Mary Pope Osborne
3. "Diary of a Wimpy Kid" series by Jeff Kinney
4. "Matilda" by Roald Dahl
5. "Percy Jackson and the Olympians" series by Rick Riordan
6. "The BFG" by Roald Dahl
7. "The Boxcar Children" series by Gertrude Chandler Warner
8. "The Chronicles of Narnia" series by C.S. Lewis
9. "The Ramona Quimby series" by Beverly Cleary
10. "Harry Potter and the Sorcerer's Stone" by J.K. Rowling
These books offer a variety of genres and themes that are engaging and appropriate for children around the age of 8.