I'd recommend Scott Aaronson's book Quantum Computing Since Democritus to anyone interested in quantum computing, mathematics, and computer science in general.

I'd recommend Scott Aaronson's book Quantum Computing Since Democritus to anyone interested in quantum computing, mathematics, and computer science in general. It covers a vast array of material, from the basics of set theory to Godel and Turing, cryptography, quantum computing, free will and time travel. It doesn't go very in depth into any specific topic, but for an engineer who's been out of college for a few years, it was at a perfect level to rekindle a love of learning and interest in a variety of topics.