So Where Are All Those Aliens
Advanced alien civilizations are now present in our galaxy. That's the message that the author sends out to readers in this interesting little book. The reasons why there has to be life elsewhere in the universe are explained, in fairly non technical words, so that most any reader can understand.The book also explains why we are presently unaware of those aliens and their civilizations.
It's a little book, at a little price, but it's packed with some big ideas.