Bedtime phenomenon: scientist develops book to send children to sleep in minutes

I'd like to see a double blind experiment published in peer review journal before having more thrust in this than in astrology. (The control group can listen to "The cow wants to ruminate.")

This sentences is very suspicious:

> Forssen Ehrlin even played recordings of the book to his own child Leon while he was still in the womb, and now puts on the audio book to help him fall asleep.

It reminds me a lot of the "Mozart effect": http://www.scientificamerican.com/article/fact-or-fiction-ba...

Frequencies (2013) https://www.youtube.com/watch?v=spa1BLMFqQU

Yup, integral calculus textbooks have this interesting effect...