A good book from well renowned mathematician Carl L. DeVito. The book tells the story of SETI and how it evolved. Along with backed science and a lot of mathematics. The author manages to transmit complex information in a simple(r) manner. It explains, using mathematics, how we could develope a language to communicate with an advanced alien race. I did like the part of the history behind SETI, with a lot of information to give context and construct. It clearly separates what SETI represents and what the UFO phenomenon is. The mathematical content of the book is a bit heavier for me, still, very informative. Good book, but for fans only.