Some good tips, but too heavy and a few images

Lonely Planet is of course great and the guide also draws attention to some beautiful corners of Thailand. However, these are not "secrets" more. Admittedly, it is difficult to always stay up to date ... because it would be better looking at forums.
For backpackers it is because of his weight rather not suitable. Unless you use it before the trip to get a glimpse at.
What's also had to complain in general at Lonely Planet, there are almost no pictures in it. Only the first few pages are a few.