Here is the slightly cryptic dedication page of “The Simpsons and Their Mathematical Secrets”.

The first people to crack it were Tom Williamson (@SkepticCanary), David James (@StortSkeptic), and Paul Hopwood (@hoppers163).

The decipherment is “an eta” (Anita, my wife’s name) + “psi” ( Si, short for Simon, my name) = “epsilon” (a term used by Paul Erdos to describe children, as they are small quantities, and we have a son called Hari).