The book contains a checklist of British genera, showing how many species there are in the UK and Shropshire and giving the latest names. There is also a checklist of species. I checked this against the Northants data and found one species from Northants that is not covered in the book. I intend to check that species is correct if I can find the voucher. Although there may be other species that occur in Northants but not in Shropshire, there is no doubt that the book will be very useful to cranefly enthusiasts in Northants.
I did notice a few minor errors but none that affected the usefulness of the book so I highly recommend it. An excellent piece of work.