This is the first book of Ben Bova’s that I’ve read. Before that I’ve only read “The Nonmetallic Isaac or It’s a Wonderful Life” in Foundation’s Friends. I bought this book randomly because I had run out of things to read on a business trip, and I don’t regret it. The book is well paced, interesting and fun to read. It also explores alien life in a way which is particularly believable (unlike many other SF books I encounter). This book reminds me of Dragon’s Egg without being so hard-SFy. A very good book.