A very important part of Optical Engineering is the Book Reviews section, in which reviews of usually two or three current books dealing with the general subject of optical engineering are published in each issue. From July 1981 until January 1986, Dr. Joseph L. Horner of Rome Air Development Center, Hanscom Air Force Base, Massachusetts, served as the Editor lof the SPIE Reports portion of Optical Engineering, which contains the Book Reviews section. Since January 1986, when the edito rial organization of the journal was changed, he has continued to serve as Book Reviews Editor. Joe has done a superb job in this volunteer position but has now decided to step down so that he can pursue other activities in SPIE; however, he has agreed to continue his duties as Book Reviews Editor until the reviews he has in progress have been published. On behalf of the officers, governors, and members of the Society, I would like to take this opportunity to express our appreciation to him for a job well done. Thanks, Joe, and best wishes.