Ooh, they look good.
Bought this recently (but needless to say haven't opened it yet, need some long winter evenings):
http://www.amazon.co.uk/The-Hidden-Landscape-Journey-Geological/dp/1847920713/ref=pd_sim_b_2
The Sandstone and Sea stacks book has a small bit about Gower and Worm's Head.
Mrs T has read Richard Fortey's 'Trilobite! Eyewitness to Evolution'. She said it was quite good. Be interesting to hear how you get on with 'The Hidden Landscape'.