If you need a different style or a completely free open-source resource, consider these highly-rated alternatives:
The book is organized in seventeen chapters, each covering a different topic. Each chapter is divided into two groups of problems, American Mathematical Society Graph Theory: A Problem Oriented Approach - AMS Bookstore
If you need a different style or a completely free open-source resource, consider these highly-rated alternatives:
The book is organized in seventeen chapters, each covering a different topic. Each chapter is divided into two groups of problems, American Mathematical Society Graph Theory: A Problem Oriented Approach - AMS Bookstore