Final answer:
One recommended 7th-grade book found on OpenLibrary is 'The Outsiders' by S.E. Hinton, which deals with themes of friendship and societal conflicts.
Step-by-step explanation:
OpenLibrary is a fantastic resource for middle school students to find suitable reading material. A book that is often recommended for 7th-grade students is The Outsiders by S.E. Hinton. This novel tells the story of teenage friendships and conflicts within a societal framework, and is an excellent read for young readers grappling with themes of belonging and identity.