The best book out there is still Quantum Computation and Quantum Information by Nielsen and Chuang. It isn't quite current, as it lacks both the advances in hardware (superconducting qubits) and algorithms (quantum/classical hybrids & the sampling benchmark that this article is talking about). It's still the best way to get started as it introduces everything from the linear algebra all the way up.

I work in quantum computing and it's the book I always recommend.