Pages, spine, and cover in good condition. ** The Planet Construction Kit by Mark Rosenfelder is a comprehensive reference book published by Yonagu Books in 2010. It provides detailed information on how to construct planets in a trade paperback format, measuring 9 inches in length, 6 inches in width, and 0.8 inches in height. The book contains 376 pages and is written in English, making it a valuable resource for those interested in the subject area of general planet construction.