The thing about geeks is that they’re smart. They know that fitness and healthy eating is important to a long and comfortable life. Now there’s a book to help the geeks tear themselves from their computers and hit the gym. Fitness for Geeks (O’Reilly, $34.99) breaks down the principals of fitness and nutrition for those who like to see the proof behind the concept. The book is a scientific analysis of many common health principals, but it’s written in a way that even non-geeks will enjoy. Bruce W. Perry, a software engineer and journalist, is the author. (311 pages).