[Buttons840]

Thirded. I also like Grokking Deep Reinforcement Learning a lot. OReilly's Grokking series is 2 for 2 for me. For those who don't know, OReilly stopped selling DRM free PDFs directly, but they still sell DRM free PDFs through other sources like ebooks.com, which I appreciate.

[alexott]

Grokking series is from Manning and do they sell PDF and ePub/mobi directly

[Buttons840]

You're right. I got mixed up. Manning has turned into a quality publisher as well IMO.