Of the 50 walks, 40 are covered with maps and 10 are described without the aid of maps, which is slightly disappointing. The only other criticism I have is the lack of any walks along the south side of the river Thames where there are many fascinating public footpaths that I know which explore the Kent side of the river.
That aside the book is an easily pocketable guide, each route map having a description of how to get to the starting point and parking instructions near to the start. Other information includes distance and estimated walk time, the gradient covered (in feet/metres), path type, public toilets along the route, and dog friendliness for those taking one. The walks are generally circular, thus avoiding back-tracking on previous ground, and there's information on where to eat and drink, plus notes on what to look out for and visit while you're on the walk, such as points of historical interest.
Very useful also is the inclusion of the relevant OS Explorer map for each walk, which I would always recommend taking so that detailed landmarks can be observed. For reference, the Explorer maps required to cover all 50 walks are:
OS 125 Romney Marsh
OS 136 High Weald
OS 137 Ashford
OS 138 Dover, Folkestone & Hythe
OS 148 Maidstone & the Medway Towns
OS 149 Sittingbourne & Faversham
OS 150 Canterbury & the Isle of Thanet
OS 162 Greenwich & Gravesend
OS 163 Gravesend & Rochester
The book is brief and informative, providing good directions for each on each walk combined with interesting geographical and historical facts.