I recently read through one book about value investing that I recommend to all who want to deepen their investing skills. The book is Applied Value Investing by Joseph Calandro. I recommend you to read this book because it has great insight to two things: (1) Why Buffett made a few of his company purchases and how he valued them. (2) How we can perform similar valuations.
I really enjoyed this book because it answered some questions related to valuing a company more deeply, that I have not yet seen answered in such a clear, yet functional way. Definitely a great read to anyone interested in the subject.