Passport Books The blue passport book, alternately referred to as the regular or tourist passport, is the most commonly issued U.S. passport. Brown, official passports are issued to other officials or employees of the U.S. government proceeding abroad in the discharge of official duties and to military personnel when required by the country of destination. SHARE: Download: Full Size (0.06 MB) Credit: David Overson, U.S. Army Europe and Africa VIRIN: 200729-A-RW508-001A.JPG Photo Gallery