John Preskill's interview here is a good place to start for the high level https://blog.ycombinator.com/john-preskill-on-quantum-comput....

Scott Aaronson's lecture notes are also great https://www.scottaaronson.com/blog/?p=3943.

I like the Nielsen book (https://en.wikipedia.org/wiki/Quantum_Computation_and_Quantu...)

Excellent introduction if you're a Computer Scientist:

https://arxiv.org/abs/quant-ph/9809016