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I can recommend this book as well! It is easy to read and understand and the choice of Go as the host language is also great.

I am in the process writing a semi-natural query language (boolean logic) targeted at domain experts (in this case biomedical researchers) that compiles to either database queries (e.g. SQL) or a function call for arbitrary logic. The goal of the compiler bit is to abstract away where the data ultimately lives (similar to GraphQL) or how it is structured.

I bought this when it appeared on HN around xmas, can recommend, its a pretty great introduction to the subject

Yeah, I've talked to Thorsten over a email a little. I'm excited about his book too, and I hope it does really well. Go is a cool choice for a language book. It's low-level enough to let you show some of the fundamental algorithms, but not as tedious to work with as C and its manual memory management.