[whew, first review for this book on here. kinda scary. a lot of responsibility. here we go:]
Lamos' main/most interesting theory is that authors express more through the errors in their works than in their intentions. This, I should say, is a very cool idea. Despite the idea's obvious issues (a big one being that it takes any power of communication away from the author and gives it all to the critic--in other words, it's the ultimate critical power play, a declaration of "I own the text and I will do what I want with it"--not necessarily horrendous, but a bit myopic), Lamos makes it clear over the course of the book that this critical strategy can hold up a critique on its own.
This strategy is used best on Proust: to summarize, ISOLT's narrator has the notable ability to see into the thoughts of all of his characters, reporting their thoughts before death, for example, but this omniscience does not spread to Albertine, on whom countless pages are written without a glimpse of internality. Thus we can see Albertine's secret world of lesbianism and the narrators exclusion from it is an important focus of the novel. And this is true, whether you attribute it to unintentional error or Proust overtly expressing the unavailability of Albertine's interiority to him. (I don't think Lamos worries about this distinction at all: an error is an error, intentional or not.)
Also interesting is the section on Ulysses, in large part because the unavoidable errors of Ulysses interest me.
As a final note, this critical move I'm detailing here really isnt a focus of the book. Sexuality is, especially as shown through this theory. And on that subject the book's pretty solid. I just got off on a tangent and went with it.