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Effective Java: Third Edition by Joshua Bloch is banned by the Ohio Prison System
(www.themarshallproject.org)
For discussing Java, the JVM, languages that run on the JVM, and other related technologies.
I wanted to recommend this book to some of my colleagues; however, I now have some doubts. ๐คฃ๐๐
So long as you're not in Ohio I think you should be fine!