It would help if you told us what your mathematical and physical background was (1st- or 2nd-year undergraduate; 3rd- or 4th-year undergraduate; postgraduate, etc.) and what level of understanding of quantum mechanics you hope to achieve.
In the absence of that information, the book I would recommend is QED: The Strange Theory of Light and Matter by Richard Feynman. It is an extremely insightful exposition of quantum theory intended for a general audience. It's widely available and quite cheap (~$15).
If your major is physics, I suggest you to read some famous QM textbooks thoroughly, for example, Quantum Mechanics written by C Cohen-Tannoudji etc, Quantum Mechanics written by Landau etc, Quantum Mechanics written by Greiner... you know, foundation is important for physics student.