There is much truth to this post about about #math textbooks.
@oantolin Counterexample: John Kruschke's book "Doing Bayesian Data Analysis" it has cutesy puppies on the cover. Good book, used it a lot.

@drchaos My partner confirms that Kruschke is a counterexample, but also that it started off life in the “default LaTeX cover page”

@oantolin