Scott Aaronson's blog and his lectures notes at MIT. His book "Quantum Computing since Democritus" is quite great as well, no matter whether you are a researche

Scott Aaronson's blog and his lectures notes at MIT. His book "Quantum Computing since Democritus" is quite great as well, no matter whether you are a researcher or just a layman. If you want to delve deeper in the Quantum Physics side of things try "Quantum Computation and Quantum Information" by Nielsen and Chuang (PhD level textbook).