I have been studying enumerative combinatorics using the book by George Martin: Counting: the art of enumerative combinatorics. I would like to continue learning the subject, but the problem is that I have found with two types of books: either they're too problem-approached (Chen and Koh: Principles and techniques in combinatorics), or rather too technical (Stanley: Enumerative combinatorics vol. 1). I am looking for an applied approach (but if it is mathematically oriented it is nice also). It would be nice if they have correct answers (I have been dissapointed by such good books like Charalambos: Enumerative combinatorics, or Tucker: Applied combinatorics which contain a bunch of errata).
EDIT:
Found this: Intermediate Text in Combinatorics?
I recommend Miklos Bona, $\textit{A Walk Through Combinatorics}$.