Urban Exploring (or UrbEx) is almost a cliched activity these days with some popular sites being overrun by photographers and left in a dissimilar state to that in which they were found.
I've not done a huge amount of Urban Exploring but what i've done i've loved. Back in April I flew to Arkansas to look for abandoned churches which was great fun.
The first chapter detailed the scrapes the author got into in attempting to get the photos in the book. After that it was more putting the photos into a historical context and whilst interesting i'd have far preferred more personal tales than reading what became a history book.
Some nice photos though. For the price it's still worth getting.