The best way to decide if a book is worth reading is to start reading it. If it isn't stop and set it aside for later. Because your future self might be one of

The best way to decide if a book is worth reading is to start reading it. If it isn't stop and set it aside for later. Because your future self might be one of the people who thinks it is worth reading. If it is, keep reading until it isn't. By "keep reading" I don't necessarily mean reading as if cramming for an exam. It's ok to read books slowly. Just as it is ok to not finish books (sufficiently slow reading is indistinguishable from not finishing a book). Good luck.