Danny Dunn and the Automatic House
Professor Bullfinch has created a radio telescope ("dish") for the government which will try to determine if extraterrestrials are trying to contact Earth. When Danny sneaks into the observatory¸ he hears non-random sounds coming from space. He then must figure out how to translate the sounds. The observatory described in the book is similar to the real life SETI project! Note: This digital edition includes the PDF¸ EPUB and MOBI (Kindle) versions of the book.