OP, it wouldn't kill you to pick a genre.
There are online lists of top classic fiction, nonfiction, tech/sci, textbooks, finance guides, etc. Libraries offer summer reading giudes for various age groups, interests.
His Dark Materials
The Once and Future King
Looking for Alaska
Carry On, Mr. Bowditch
anything by Maya Angelou, Freud, Kafka, James Baldwin, Neitzsche, Dostoevsky
The End of the Affair
The Secret
The Bible Code
Their Eyes Were Watching God
Me Talk Pretty One Day
If He Hollers, Let Him Go
Proverbs (the Bible chapter after Psalms)
The Autobiog of Malcolm X