In reply to cortushka:
Rockfax produce several guidebooks to the Peak District. These books are selected buttress guidebooks and contain arguably all of the routes any occasional visitor would be interested in.
Eastern Grit (2006) -
http://www.rockfax.com/climbing-guides/books/eastern-grit-2006/
Peak Limestone (2012) -
http://www.rockfax.com/climbing-guides/books/peak-limestone-2012/
It sounds like these are probably the two guidebooks you want.
If you want bouldering then there is:
Peak Bouldering (2014) -
http://www.rockfax.com/climbing-guides/books/peak-bouldering/
There is also
Western Grit (2008) - covering the western crags but it doesn't sound like you will be over that far.
The BMC produce guidebooks that cover the gritstone areas in more detail.
Burbage Millstone and Beyond (2005),
Stanage (2007),
Froggatt to Black Rocks (2010). These three books cover the same crags as Eastern Grit in greater detail, and they also include bouldering. There is one BMC book to the limestone covering some of the sport climbing in the quarries called
From Horseshoe to Harpur Hill (2004) although this is all covered, and much more, in
Peak Limestone.
If you are short of money then the two compact
Peak Pokketz (2007) guides from Rockfax may be of interest since you can get the best routes across all the Eastern Grit and Limestone in two books for less than £20.
http://www.rockfax.com/climbing-guides/books/peak-ne-pokketz/
Alan
PS. UKC and Rockfax are the same company and I am the director of UKC/Rockfax hence I have a vested interest in this.