This is a concise but pretty good guide of Delhi, and I used it a lot during a long stay in this city, which in my opinion is much more interesting than many tourists think. The maps at the end are very useful. However, if you have to spend a good deal of time in Delhi, what you should really get is Delhi's "Eicher City Guide", which is just splendid. It's like a higher quality "eyewitness" guide of Delhi. Hundreds of excellent picture, a lot of historical information, and amazingly detailed city maps at the end. Eicher's maps cover the whole city (which is huge) and not just the tousist spots, so they can be immensely useful if you have to stay in Delhi for a long period. Eicher is unfortunately pretty old, and difficult to find in the US, but it's worth looking for it. It should not be difficult to find it in India (where it is published) for a fairly low price. My advice is to have both Eicher and the latest Lonely Planet guides.