I want one that’s fun to read, and one that is not horrible anti-communist propaganda. I tried to find a biography myself but it turned up a bunch of weird reactionary books as well as some that just look boring. Also idk if this is the right community for this question? But I hope so…
Lenin wrote a brief biography of Karl Marx, not too comprehensive though but it’s a start. https://www.marxists.org/archive/lenin/works/1914/granat/index.htm