A guide book is a book for tourists or travelers that provides details about a geographic location, tourist destination, or itinerary. It is the written equivalent of a tour guide.

It will usually include details, such as phone numbers, addresses, prices, and reviews of hotels and other lodgings, restaurants, and activities. Maps of varying detail are often included. Sometimes historical and cultural information is also provided.

Different guide books may focus on different aspects of travel, from adventure travel to relaxation, or be aimed at travellers with larger or smaller travel budgets, or focus on the particular interests and concerns of certain groups, such as lesbian and gay singles or couples. Guide books are generally intended to be used in conjunction with actual travel, although simply enjoying a guide book with no intention of visiting may be referred to as "armchair tourism".

Medieval Arab world

The idea of a guide book dates back to the medieval Arab world, with the establishment of treasure hunting as a major industry from around the 9th century. Many guide books for travellers in search of ancient Near Eastern artifacts, monuments and treasures were written by experienced Arabic treasure hunters and alchemists which became best sellers in the medieval Arab world. This was particularly the case in Arab Egypt, where ancient Egyptian antiquities were highly valued by early Egyptologists.

Modern version

The modern tourist's guide book was separately invented by Karl Baedeker in Germany (1835) and by John Murray III in England (1836).James Buzzard. "The Grand Tour and after (1660-1840)" in The Cambridge Companion to Travel Writing (2002). Page 48-50. Baedeker and Murray produced impersonal, objective guide; works prior to this combined factual information and personal sentimental reflection. The availability of the books by Baedeker and Murray helped sharpen and formalize the complementary genre of the personal travelogue, which was freed from the burden of serving as a guide book. The Baedeker and Murray guide books were hugely popular and were standard resources for travelers well into the 20th century. As William Wetmore Story said in the 1860s, "Every Englishman abroad carries a Murray for information, and a Byron for sentiment, and finds out by them what he is to know and feel by every step." During World War I the two editors of Baedeker's English-language titles left the company and acquired the rights to Murray's Handbooks; the resulting guide books, called the Blue Guides to distinguish them from the red-covered Baedekers, constituted one of the major guide book series for much of the twentieth century and are still published today.