Fun book recommendations

Hi, I'm currently reading "office hours with a geometric group theorist" and looking for something similar to read for fun.

Background: I'm undergraduate student (europe) and have interest in algebra and topology. I've completed intro courses in algebra and general topology. This semester I'll start more advanced algebra course (galois theory, modules, etc) and algebraic topology course (and more but those I'm looking forward to most). I've also started learning category theory in my free time.

Is there any book in a lighter tone, yet rich in actual math content similar to one mentioned above that covers topic in algebraic topology, algebra or something like that? Topology and colorful pictures are preferred :)

Any suggestion is appreciated, if book isn't on my level I'll wait until I can understand and appreciate it :)