Just finished reading this and found it very informative and inspiring.
“Are we alone in the universe? This is surely one of the biggest questions of human existence, yet it remains frustratingly unanswered. In this provocative book, one of the world’s leading scientists explains why the search for intelligent life beyond Earth should be expanded, and how it can be done.”
“Sometimes I think we’re alone in the universe, and sometimes I think we’re not. In either case the idea is quite staggering”. Arthur C. Clarke
The Eerie Silence provides excellent, scientific thinking around this conundrum.