Recreational path guides include OS mapping extracts based on 1: 5,000 scale (Explorer) mapping and show the route of the trail itself, though do not extend very far either side. Walkers may want to carry additional maps if deviating from the route to accommodation, etc.
Aurum publish Out On Your Feet: The Hallucinatory World of Hundred-Mile Walking, LDWA member Julie Welch's book about her first attempt to walk the LDWA 100 mile event.