I really liked this, but it could use an update -- the overall, general project that Skiena describes is more relevant and useful than ever, but to a reader in 2023, it's easy to get lost in the particulars of the late 90s technology they used.
For example, Skiena goes into extreme detail about programming a modem to dial into the betting system and place their bets; nowadays, that's utterly obsolete and silly. Surely any corresponding thing nowadays would use some website, perhaps one that has a nice web API.
But the ideas about gathering the data, developing and validating the model, and so on, are still very relevant. More so than they were at the turn of the century when he wrote this book! I think rewriting this book with the same ideas, but with the context of the technology and culture of the 2020s, would be a welcome update.