The definitive book on asteroids is the 1300 page Hazards due to Comets and Asteroids edited by T. Gehrels and published in 1994 by the University of Arizona Press. Over 130 authors contributed dozens of articles to this massive volumn, which discusses everything from how to detect potential impactors, to the consequences of their entering the Earth's atmosphere. There are literally thousands of bibliographic references, and hundreds of figures. The cost is $70.00.