I presume we're talking about, not just the introductory bit actually titled The Dead Men Diaries, but also all the linking material between the stories in the collection. Mostly, the material is perfunctory and honestly unnecessary. The stories could have been left to stand on their own. But these bits are entertaining enough and certainly harmless.

a fairly decent collection of stories, nothing special, but there are a few in there that are pretty damn good. personal favourites are "the light that never dies" and "the least important man"