Lonely Planet
Although all their guidebooks are budget conscious, Lonely Planet has a special series called Shoestrings Guides which focus especially closely on saving some cents:
Europe on a Shoestring
Africa on a Shoestring
South America on a Shoestring
South East Asia on a Shoestring
All Lonely Planet Shoestring Guides
Rough Guides
Rough Guides started as a travel guide book company catering to budget travelers but has graduated to (according to their website): "...supplementing the 'rougher' information about hostels and low-budget listings with the kind of detail on restaurants and quality hotels that independent-minded visitors on an any budget might expect." That's putting it well. As well as being chock-full of money-saving ideas, Rough Guides have some subversively salient gems in every book, like how to hang out on which street corner to get temporary work.
Rough Guides
"Europe From a Backpack"
The facts and then some -- worth a look:
Europe From a Backpack
MTV-Frommer's Guides
Some called the new travel guidebooks from an MTV-Frommer's partnership "trendy" (and making reference to "Pimp My Ride", of course): inferences were that you would find the guidebooks inspirational because using words like "awesome" and "totally" are the way you'll understand travel recommendations. The facts turn out to be that these are, like, totally awesome and don't use phrases like "totally awesome." Like, check 'em out.
