What is an easier combinatorics book than Miklos Bona's "A Walk through Combinatorics"?

Question

I'm going through Miklos Bona's "A Walk through Combinatorics" (for a second time) and am having a lot of trouble understanding it. I find that most of the problems are too difficult and that it gets very complex at times. Chapter 6, the chapter on cycles in combinatorics, was so complex that I had to skip it entirely. Even in other chapters, I am unable to do over 50% of the problems on my own. I am currently an independent learner. I have all of the background information necessary to study the book. It's just that the book is too difficult. Could anybody recommend me an easier book that would still cover a basic combinatorics course?