I just finished reading Invisible Frontier: Roofs, Ruins, and Rooftops of Hidden New York, which is not really that bad despite what I am about to write below. It has very nice descriptions of the historical and enginneering backround of the various structures explored, written in a style similar to H. Petroski. or perhaps David Hackett Fischer. The narration of the "missions" is decent. Most of the places explored are interesting, and the photography is good. I'm probably being a bit too harsh in light of the Jinx organization's successes, but the book is so close to being great, and falls short...so frustrating. The authors seem to habitually move in too large of groups, under-equiped and under-motivated (they turn back half-way to their goals over and over). The authors' attempts to puff up the importance of their ameteur philosophical discussions and their monthly society meetings comes accross as horribly self-indulgent. Even the trademark jinx black suit and cocktail dress attire, which is admittably cool, is described in terms of "The fields of philosophy and science will never take our empircal findings seriously if we dress as adolecents." I wish I could say that in context that statement is a joke, but unfortunately it does not seem to be. Empirical findings of WHAT? Are you sequencing DNA in old buildings? Refining ethical theories in tunnels? With a little less pretension, and more compentent exploration it would have been an amazing book...