I play 20NL 6-max cash. Winning at a reasonable rate (small sample size).

I don't use solvers in my study, but I'm planning to get started soon-ish (maybe next month).

I recently came across The Mathematics of Poker by Bill Chen. I've skimmed through it and it looks fine (though a bit dense). Is it a good book, and should I spend some time reading it? Or should I wait till I move to higher stakes?

I have a math/computer science educational background, so I'm reasonably confident that I can handle the technical aspects. I'm just not sure if I should spend time on it.