I'd recommend Griffiths "Introduction to Quantum Mechanics". The writing style is informal enough that it's comfortable to read, but still had enough mathematical rigor to teach the material. It's certainly not a definitive reference, but I only reach for my other books after I've determined that it's not in Griffiths.
The Quark and the Jaguar by Murray Gell-Mann is a very idiosyncratic book, but with an interesting middle section on quantum mechanics.
If it's your first book on Quantum mechanics, I recommend: In search of schrodinger's cat