
- Quantum Computation and Quantum Information by Michael A. Nielsen Isaac L. Chuang
A bit gentler introduction: - Quantum Computing: A Gentle Introduction by Eleanor G. Rieffel
[0] https://www.amazon.com/Quantum-Computing-Introduction-Engine... (Here is a much shorter document by the same authors written explicitly for non experts: https://arxiv.org/abs/quant-ph/9809016)