Rather then give you specific ideas on what to to buy book lovers and bookish people. I have found bookish gift websites to guide you too.
This website has a whole range of gifts for us bookish lovers with some fab Jane Austin themed gifts. I particularly love the little stocking fillers on there.
To let you in on a little secret I am planning at some point to treat myself to a pair of bookish earrings from this website. As a Book and earring lover I am quite shocked that I have yet to have a pair of earrings which are books in my earring collection.
Etsy has some amazing items on there and you could possibly spend all day looking which I think is part of the fun.