tolkien books, help needed

hey everyone, i was wandering how many books tolkien has wrote, and what they're called so that i can find them, these are the ones that i know:

1.the hobbit
2.the fellowship of the ring
3.the two towers
4.the return of the king
5.the silmarilion
6.farmer giles of ham
7.Adventures of tom bombadil
8.Tree and leaf
9.smith of wootton major
10.the homecoming of Beorthnoth
11.Tales from the perilous realm
12.Leaf by Niggle

but that's all, does anybody know any more?

lv pip