I'm not sure what people mean when they say a self help book.
I spent 7 weeks in out-patient group therapy in 2011 and our last week there we wrote a stay well plan that was like a self help book.

We wrote things like:
Eat 3 well balanced meals a day with 2 healthy snacks.
Drink only 1 cup of coffee per day (or none)
Drink herbal teas instead of black tea
Go to bed at the same time every night (if that's possible for someone with small children)
Get up at the same time every day
Keep in touch with your family at least once a week
and so on.

It was a list of what we thought we needed to do to stay healthy.
It also pinpointed things to watch for. If we start staying up until 3 am every night or sleeping all day or eating nothing but chips and cookies and avoiding our families, then we know that something is wrong.

Does that make sense?