I have bought several guides in this series and I absolutely love the guide for Hampshire and the New Forest. Although I can't claim to have walked all the routes in this Chilterns and Thames Valley guide, like the previous reviewer, I'm really disappointed with it and would like to warn others. There are 2 basic problems: 1. the writers seem to think it's OK to lay out a route with some attractive country walking at the beginning and end of a 7 - 10 mile route but lead you through some really dire country in-between; 2. many of the paths I've encountered so far are hugely overgrown with nettles and brambles. OK, that's not the writers' fault, but you need to know that some of those paths haven't been cleared in years!
For example, the walk that sets out from Streatley along the Ridgeway Path and ends up with a stroll along the Thames Path from Moulsford to Goring... those sections are fantastic, but should have remained as 2 separate smaller walks. The section connecting the Ridgeway path down to the village of Moulsford is appalling: fly-tipping, pollution filled potholes and puddles, paths overgrown with nettles AND a near lethal stroll down a very fast A-road for 10 minutes. The book claims that you can walk along a grass verge. Yes, but not all the way!
The other Thames Path-based route (around Abingdon) is not much better. It's OK until you get to Sutton Courtney, but then you've got to tramp down road and farm tracks (more pollution, more fly-tipping) for miles before you re-join the river bank (which is very badly maintained). I'm only glad I didn't have kids with me.