Help: What book should I write next?

I want to write another book about happiness at work and I have a number of ideas to choose from.

I would love to hear your thoughts – which of these books would give you the most value? Which intrigues you the most?

Leading with happiness

A book on a new kind of leadership that seeks to maximize happiness rather than profits.

Manners for managers

A short book of rules for managers in different situations – to help managers avoid behavior that is simply rude or bad manners.

Quit already

A book on quitting to help everyone who feels stuck in a bad job get the heck out of there.

The happy team

A book on how to create a happy team.

The customer is always right is wrong

How putting employees first helps them put customers first