The only guidebooks you need are listed below with websites. I Andy Graham have traveled perpetually for over 15 years, visiting 90 countries. I will only recommend these four guidebooks for the savvy world traveler. Yes, other guidebook can help as city guides, but generally these four below are the only ones that properly manage whole countries and vacillate living within a budget.
Use one of these as your primary guidebook, then buy others to augment them, please note.
These four guidebooks will save you money: Most guidebook are written to cost you money, to keep you on a continuous splurge.
1. Lonely Planet www.lonelyplanet.com
2. Rough Guides www.roughguides.com
3. Footprint Handbooks, www.footprintbooks.com
4. WikiTravel.org an online guide only, http://wikitravel.org
List of the majority of Names of Guidebooks:
This list is a select sample of the full range of English Language uide book publishers from Wikipedia.
DK Eyewitness Travel
Forbes Travel Guide
In Your Pocket
Mr. & Mrs. Smith
National Geographic Traveler
Not For Tourists
Spartacus International Gay Guide
Spotted by Locals
Ulysses Travel Guides
Wallpaper City Guides