A very good general reference book, but with vital details on specific recommended (good for westerners etc) hotels and info on public transport, health, food, prices, local customs etc. Could prove to be invaluable, but certainly will be a great help at least and save you lots of time, money, inconvenience or even emabarrasment as a result of ignorance of local customs. Worth the purchase price!
Much of the information is 4 or 5 years old .Some of the hotels for example either don't exist or have been radically changed However it remains the best guide currently available in English. Buy it if you plan traveling to this amazing country
This is an awesome book and considering the state of the country regards security I am surprised it has been written, so well done Lonely Planet! Not much on the south as to be expected. A must if you are going to Afghanistan on holiday (!!) or working there.