This Thursday Next book was a bit slow to begin with. I had the horrid feeling that I was going to be sorely disappointed in it. About halfway through, when the written Thursday crosses into the real world, the pace picked up considerably. The first half felt like an extended effort to set the scene for jokes. The second half felt like a normal Thursday Next book.
I shake my head in awe at Mr. Fforde's cleverness.
I'd recommend this to those who are already fans of the Next series, but not to those new to his work.