From the back cover: "Put some punch in your old scenario, or begin a new adventure! Challenges for Champions is an invaluable play supplement for Champions. It gives you 10 action-packed scenarios plus tips for adapting these adventures to guarantee your heroes maximum excitement! Scenarios include background and players' information, plot outline, maps, descriptions of 17 NPCs and more - everything you need for super heroics! Challenges for Champions also provides extensive guidelines to help you design your own scenarios. Dare to be creative - accept the Challenge!"
The titular Challenges are fairly short, from two to five pages. The book is closed on about sixteen pages of supervillian statistics.