There is an independent bouldering guide as well, written by Robin Mueller, and an update due at some point but it is currently out of print and hard to find.
Yes, lots of bouldering and short soloing venues up and down the county eg Brownstones Woodwell and Warton Pinnacle Crag appear in the definite guide. There's also a dedicated Lancashire bouldering guide by Robin Mueller.
Thanks Godwin. I pressed the u and kept it pressed. And that's what happened. On a Windows laptop. At least I haven't altered the good author's name with the addition of an extraneous 'e' as many seem to.
Usually you can indicate a missing umlaut adding a following "e" such as Mueller, Joergen, etc if you struggle due to lacking a German keyboard layout and it's not usually considered extraneous.