The Book Of Knots is a book of setting information. It is a a companion to the JAGS surreal horror setting Wonderland. From the intro:
"Lord Kelvin (from whom we get the term absolute zero) hypothesized in 1876 that the 'atoms' that made up reality were best understood as knots-as confgurations of tied strings. This led to the science known as knot theory, which had very little practical application when the theory of knots as atoms was eventually disproved.
"Wonderland is all about knots. It’s all about the twisty little tricks and closed loops of symbolism and foreshadowing. The forces of simile are what binds like and like together, not gravity-unless you mean 'the gravity of the situation.'"