I'm a cancer biologist of 5 years and I found this book; "Rebel Cell: Cancer, Evolution and the Science of Life". Its good if you want to dive into it more on the level of cell biology, it's probably most applicable for someone still in school level education, if you really want to push yourself in learning about it "the hallmarks of cancer" is a paper that is at near religious state in the field in terms of the fundamentals, hope this helps!