I had a baby who wouldn't sleep, and at 3 a.m. one night, while in a rocking chair with him, my sleep-deprived brain thought it would be funny to write a book of science experiments you can perform on your baby. Woke up the next morning, still thought it was a good idea, and decided to pursue it.

That's awesome! Is that the first time you decided to write a book? Or was this something you were planning on pursuing regardless?

Wow, first time I've seen something on HN useful on baby related stuff :) buying now :D