I mostly ripped the introduction from Resources for Starting to Read Japanese Content (thanks @Radish8!). Let me know if you want me to add or clarify anything.
If people like this thread and the general format, I’ll ask to get it pinned and eventually make it a wiki so anyone can update it. I’ll also update the book club section from the resources thread to just link to here.
Also, does anyone have a better word than “offshoot”? I can’t find the right word. “Ongoing”? “Continuing”? “Recurring”?