The best thing about this book is that it shares with students the way scientific knowledge unfolds: it begins by describing the discovery that many frogs were going extinct very suddenly from an unknown cause, then it proceeds to describe the unraveling of this puzzle.  It shares the scientists thought processes as they considered and ruled out assorted possible causes and why.  Even when they discover that the deaths are being caused by a particular fungus, this just led to further questions as to how the fungus spread and what could be done about it. It then goes on to describe the creation of a conservation center and the assorted problems that had to be overcome, as well as describing the possible avenues being considered to develop a long-term solution to the problem for the future.  The color photos are vibrant and the graphics are visually appealing without being busy or distracting.  A beautiful, worthwhile book, which could become out-dated rather soon.