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The Power of When: Discover Your Chronotype–And the Best Time to Eat Lunch, Ask for a Raise, Have Sex, Write a Novel, Take Your Meds, and More by Michael Breus

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Book about chronobiology / circadian rhythm & how this varies between different people.
In essence:
Morning types (lions)
Evening types (wolves)
Day types (bears) majority of people
Insomniacs (dolphins)
Goes into detail citing research, in a not particularly systematic way focusing on different types of chronotypes and how these individuals will be more effective at certain times of day.
Quite interesting how he suggests applying this knowledge and being aware of different chronotypes preferences can be useful in day to day life.  For example ask for raise on Thursday, cold call from 4 pm until 6pm to get majority of people when they are feeling good.
Worth a listen but a long book & rather repetitive as breaks down each point across four chronotypes.
Interesting bit about travel, in which it mentions NASA way of over coming jet lag, duration of optimum power nap which is 10 or 90 mins.  Lots of information about coffee and when to drink it / not drink it / morning routines.
When to take your medications is an overstatement to have in title, mentions ACE inhibitors and aspirin at night that is about all.
Bit about sex is clearly just to sell book by having in title.
Useful to listen to if you are an insomniac or treat anyone with insomnia, they would be referred to as a dolphin in this book.

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