Science blunders about over time, so this edition is hopelessly out of date. Wonderful topics are a bit philosophical at times. Perhaps a 3-star effort in 1996. ( )

Really quite good, and fascinating to read twenty years after it was published. ( )

Nearly all questions I had already considered. ( )

Another of those 'just read a few pages at a time' books. Basically this is a book of 101 3-page essays about questions from the borders of science. Even though he was writing this book 15 years ago many of the questions are still current and many remain essentially unanswered. I did enjoy Trefil's very readable book.