An electronic textbook. A disk version is also available upon request from the author. This text provides background information on the biology, ecology and management of Ips perturbatus. There is also an annotated reference section of the most pertinent Ips information. Subject matter of this hypermedia textbook is displayed by selecting a chapter and section to view. Within chapter sections, expanded discussions on selected topics, literature references, and graphic illustrations are accessed by selecting hypertexts or links.