I'm new to LotFP and since there is no book catalogue I can find, I need some guidance.

So there is one core book, one referee book and the rest are all adventures? Is there a setting book? Or a bestiary?

Which books are necessary or recommended to play the game? I'm only interested in printed books, not pdf's.

What are the best adventures (still in print)? Is there an underground adventure to combine with veins of the earth?

Can you still get the tutorial book?

Thanks for getting me started.