Is there a comprehensive resource (website, book, other) that provides information on walks in the Peak District, including maps, locations, length, ease, sites of interest, etc?

I've mainly found websites that have a smattering of different walks but nothing that provides an overall and useful database of them.

Is there a comprehensive or "best of" resource (website, book, other) that provides information on walks in the Peak District, including maps, locations, length, ease, sites of interest, etc?

I've mainly found websites that have a smattering of different walks but nothing that provides an overall and useful database of them.