combinatorial analysis

I think I have found two nice books about combinatorial analysis:
- A walk through combinatorics, by Bona
- Combinatorics, a problem oriented approach.

At first I was not very enthusiastic about the second, because,
as the title says, one has to absorb the material solving problems.
Aaagh. Work :-(. But I worked myself thru Chapter A and B, and
the exercises are really well-written and well-tuned. A pity
that the book is relatively expensive (about 40$) for its size.