There’s a book reading club in the database internals discord, on this book! We’re up to chapter 8, but a motivated reader can still easily catch up: https://databass.dev/discord
Interesting. I bought the book with Reuter's student discount, but never read it (apart from some pages). Haven't really done anything with databases since university if I don't count looking into some sqlite database an application has stored on my PC or phone.
I guess the book must still be in storage somewhere, I never through away anything...
