I was asked by Hasan Hasan, a junior developer, which of the following three books I'd recommend. Personally I think all three books are fantastic (I would recommend them all) but they do approach the topic from very different angles.
Mastering Bitcoin (2nd edition, Andreas Antonopoulos) was the first technical Bitcoin book to be published. The 2nd edition was published in 2017 so there may be some outdated details but the vast majority should still be accurate today. It does have some chapters on concepts but not as comprehensively as Grokking Bitcoin (see later). It will provide instructions for configuring a Bitcoin Core build from the command line and contains a lot of Python code examples. It is especially strong at explaining Bitcoin scripting. For an example of Antonopoulos teaching Bitcoin Script see his 2017 presentation at SF Bitcoin Devs (video, transcript).
Programming Bitcoin (Jimmy Song) is also a technical Bitcoin book but covers different topics in depth than Mastering Bitcoin. Mastering Bitcoin mostly avoids cryptography but Programming Bitcoin has three detailed chapters on finite fields, elliptic curves and elliptic curve cryptography. If you like math or want to understand how public keys and signatures are generated in detail this is the book for you. There are also more Python code examples in Programming Bitcoin than Mastering Bitcoin. There are some conceptual explanations but generally I would say it assumes you understand most concepts covered in Mastering Bitcoin and Grokking Bitcoin (or that you best learn those concepts through code rather than written explanations.) For an example of Jimmy Song teaching ECDSA and transactions see this presentation at Bitcoin Edge Dev++ in 2017 (video).
Grokking Bitcoin (Kalle Rosenbaum) contains minimal code, instead it focuses on the various challenging concepts that you need to understand to get to grips with Bitcoin. For example, Kalle Rosenbaum presented how SegWit works at London Bitcoin Devs in 2020 using the content from Grokking Bitcoin (video, transcript). If you are having trouble understanding a concept I'd recommend that book as some of the diagrams, explanations and exercises are really useful. It is easy to discount this book as being the less technical of the three but if you are already a junior developer you may have more trouble with concepts than command line and code. It is a technical yet accessible book.
They are all open source so you can try before you buy. Mastering Bitcoin is here, Programming Bitcoin is here and Grokking Bitcoin is here with a special build of the book including diagrams here.
If you like them and can afford to buy them I encourage you to support the authors and publishers by purchasing them. Whether the authors publish future editions of the book or continue to produce these kind of educational resources depends on how successful the books are. In Grokking Bitcoin's case you can buy directly from the Manning publisher here but all are available from Amazon or your usual book seller.