Well, here we go:
The Zampano essay on The Navidson Record is a sublime piece of writing, the early description of the house subtly altering its dimensions is one of the eeriest pieces of literature I've encountered. The Johnny Truant narrative becomes a bit overcooked, in my opinion, and doesn't feel particularly convincing to me as it develops. Definitely an interesting, worthwhile novel though.
Incidentally, not a similar book at all, but if you find you've become a fan of writing about imaginary films, Paul Auster's Book of Illusions
descriptions of non-existent silent films are even better than Danielewski's.