• Need Teacher 3, "library topic" 10 to teach.
Reading books provides reader and student skills at slow pace, iirc. You need no skill to read books, unlike in adventure mode.
Military training provides both teacher and student skills faster - just have dwarf run a demonstration to teach something to someone else as good or worse as them in any military skill.
Writing is just quality, I believe. I've also tested wordsmith - had it rust away on a librarian.
• You probably could fit all those writing materials into two chests, and all the books you have produced so far into 1 bookcase. (Still, it's cool to have a large library.)
But more importantly, beware of bugs:
a) Library tends to queue a single job at time for whatever tasking, i.e. scribing. Then if the scribe gets interrupted, the book remains TSK'd but the scribe never returns. Workaround is to (mass-)forbid, wait a bit, unforbid.
b) There have been container function failures with overlapping/second library/room. Thankfully, you can just (stock)pile all you want in a library on the ground in library instead, much like a hospital.
• As far as unique science topics go, there are few of particular note:
- Mechanic counts, is an useful moodable skill (will be taught to others through discussing) and can be easily trained to above 10. If you don't want piles of dabbling mechanics and just care about the teacher-student relationships, Organizer or Record keeper are also trainable to high levels.
- Healthcare skills count.
- Philosopher is necessary to write value agendas books, which allow books to change the values of readers (instead of merely giving little student, reader experience and satisfying a need for abstract thinking).
- Critical thinking branches out the most. Also, required to be a sage.
• While it can take a while to produce a book (they need to make a breakthrough or have an experience), I'd also check their personality and needs - valuing knowledge, curiosity and desire/need for abstract thoughts are all useful - though it's hard to have the last one go into red when your fort is stocked-up on books, a dwarf who has it go into red would probably make a good scholar.
However, this is unlikely to hamper everyone of your starting 7.
• When it comes to books, just plain quires are also readable - named as <X> quire before writing and "Name" (copy) after being written on.