This is a book that is part science and part philosophy with some Walt Whitman prose thrown in for good measure. It’s kind of charming in its own way. Setting aside the science for a moment, the book is an exercise in the meaning of life. I didn’t read the whole book but enough that its was interesting and might appeal to a certain reader. Not for the latest science, but for the rather more philosophical questions of the purpose of life. I might place this in the classic literature category. Berrill wrote many books out of the popular science category and might have a place in any library, depending on the audience.