Download or read book Crisis on Doona written by Anne McCaffrey and published by Orbit Books. This book was released on 1993 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Science fiction. Over twenty-five years ago, the first humans came to the beautiful planet of Doona. But their initial survey had ignored one important fact - they were not alone. The alien, cat-like Hrrubans had settled there first. By the authors of G̀eneration warriors'.