I need recommendation about heat transfer book . I am having a difficult time learning the concepts. I've tried reading several dfiferent textbooks(e.g. Cengel, Kreith, Chris Long), and though they sometimtes state the same theorem using different wording, different arguments, etc, I am still having a hard time understanding it. I often learn best when I solve problems that use concepts, but a lot of these textbooks do not have many problems or detailed step by step solutions. What are some good heat transfer books with many solved problems and a chapter about combined heat transfer?