Defining Diana is a hybrid, a mixture of mystery and SciFi. The mixture is about 70% mystery and 30% SciFi. If you like these type hybrids, then thi..Show More »s is a great book. It is set in the future where there are a mix of cyborgs and humans. However, the book spends most of its time working out the details of a mystery. If you like those type books, you will like this one; if you are looking for a SciFi book you may be disappointed.