The Collaborative International Dictionary of English v.0.48:

Guidebook \Guide"book`\, n.
   A book of directions and information for travelers, tourists,
   etc.
   [1913 Webster]

WordNet (r) 3.0 (2006):

guidebook
    n 1: something that offers basic information or instruction
         [syn: guidebook, guide]

Moby Thesaurus II by Grady Ward, 1.0:

80 Moby Thesaurus words for "guidebook":
   Baedeker, Yellow Pages, account, acquaintance, announcement,
   bibliography, blue book, briefing, bulletin, business directory,
   catalog, checklist, city directory, classified directory,
   communication, communique, compendium, cookbook, cookery book,
   data, datum, directory, dispatch, enchiridion, enlightenment,
   evidence, facts, factual information, familiarization, field guide,
   finding list, gen, general information, gradus, guide, handbook,
   handlist, handout, hard information, how-to book,
   incidental information, index, info, information, instruction,
   intelligence, itinerary, knowledge, light, manual, mention,
   message, nature book, notice, notification, phone book,
   presentation, promotional material, proof, publication, publicity,
   reference book, release, report, road map, roadbook, sidelight,
   statement, telephone book, telephone directory, the dope,
   the goods, the know, the scoop, transmission, travel book,
   vade mecum, white book, white paper, word