Claiming to be "the best, most up-to-date source of maps" for the region this is a book by Lonely Planet that holds nothing it promises. I used the Laos and the Thailand maps to bike from the Chinese border at Boten to Bangkok via Luang Namtha, Luang Prabang, Vientiane, Udon Thani and Korat. I found that not a single (!) information regarding distances was right. And they weren't off by a few kilometres but rather by 10 up to 25 km (Udomxai to Pak Mong). Further the maps, especially in Thailand, depict roads to be unpaved where according to local information (and Thai maps) they were paved since more than a few years. The topographic shading is sloppy at best, if not completely incorrect. The mistakes are far beyond the "things change fast" warning published in every Lonely Planet guidebook and signal a further deterioration of quality at Lonely Planet. I strongly advice against buying it, it's just a rip-off!