Cyclecity Cycle Guide Books
CycleCity have some very good cycle guide books.
They include maps taken from the Ordnance Survey Landranger 1:50,000 maps, with junction-by-junction route instructions. There are lane rides and off-road rides, plus pubs, cafes and tea rooms!
Or here for individual cycling guide books: Kent and East Sussex; the Chilterns, Hertfordshire and Essex; Around Oxford; Surrey and West Sussex; Hampshire and the Isle of Wight; and the Lake District.