This is my review of Delhi, Agra and Rajasthan (Travellers) by Melissa Shales.
If you are looking for a compact guide to take on holiday, this is useful if your focus is on Rajasthan or "The Golden Triangle". Since I was only visiting Delhi and Agra, I found the relevant sections a little too brief, in particular on the "main sites" such as the Taj Mahal or Red Fort at Agra which you are mostly likely to visit. Quite good on background practical and potted cultural information, the guide includes such telling insights as: "You will return home enriched and bemused and whether you loved or loathed the country will never be quite the same again!" Some of the main sites e.g. in Delhi are marked on maps, which could have been larger, but at least this helps orientation.
It's frustrating at times in covering off-the-beaten-tourist track itineraries and pictures of fascinating places you do not get to see on a standard package tour, but I suppose these support further reading you may feel inspired to undertake after the tour.