Would thoroughly recommend this book if you are looking for walks that are longer and not your usual "run of the mill". The only thing I would say is the walks usually turn out to be rather longer than stipulated, so beware if you are limited on time. Its not usually a problem for me as in most books I find the walks are not long enough! The walking instructions are spot on and non-ambiguous and so although an ordnance survey map would be advisable, its by no means essential. We haven't got lost once on these walks.