I've been reading it for some time, but it's taking me forever because I often find that I want a deeper understanding of what he's talking about: what's this m

I've been reading it for some time, but it's taking me forever because I often find that I want a deeper understanding of what he's talking about: what's this molecule composition again? What are its bounds? Why is it more fragile anyway? How does redox works again? I think it needs to be read with a BSc chemistry class cheat-sheet of some sort, which I haven't found yet. Anyone knows any dense, crystal-clear chemistry 101 ressource on the web? Edit: grammar.