Instruct: Classify the given review as either positive or negative.
Query: A 400 page car chase.

With about 50 pages to go, I gave up on this one, not caring what happened to any of the boring heroes and villains of this tedious, repititious work.I love time travel science fiction, but even so, this book did little to excite me. About all we learn about the inhabitants of fourteenth century France is that they were a bunch of vicious barbarians, albeit more advanced scientifically than we might have thought. Otherwise, the parts of the book set in the past are a long and tiresome series of contrived near-disasters and escapes that eventually blend together to where they're indistinguishable. The amoral executives of the scientific company set in the present day are stock action movie characters.This is not one of Michael Crichton's better efforts.