Published Books
![Choose Your Customer Book, written by Johnathan Byrnes and John Wass Choose Your Customer](https://profitisle.com/wp-content/uploads/2023/06/pi-book3.png)
Choose Your Customer
How to Compete Against the Digital Giants and Thrive
“Choose Your Customer explains how to develop and manage new innovative, win-win relationships with your customers that target and meet their specific, evolving needs. Every manager will benefit from reading it.”
Mike Kaufmann,
CEO of Cardinal Health
![Islands of Profit in a Sea of Red Ink book, written by Johnathan Byrnes ISLANDS OF PROFIT IN A SEA OF RED INK](https://profitisle.com/wp-content/uploads/2023/06/pi-book1.png)
Islands of Profit in a Sea of Red Ink
Why 40% of Your Business is Unprofitable,
and How to Fix It
“Astonishing but true: Nearly 40% of every company is unprofitable by any measure and 20%-to-30% is so profitable that it provides all the reported earnings and subsidizes the losses.“
Dr. Jonathan Byrnes,
Senior Lecturer at MIT
![Choose Your Customer Book, written by Johnathan Byrnes and John Wass Choose Your Customer](https://profitisle.com/wp-content/uploads/2023/06/pi-book3.png)
Choose Your Customer
How to Compete Against the Digital Giants and Thrive
“Choose Your Customer explains how to develop and manage new innovative, win-win relationships with your customers that target and meet their specific, evolving needs. Every manager will benefit from reading it.”
Mike Kaufmann,
CEO of Cardinal Health
![Islands of Profit in a Sea of Red Ink book, written by Johnathan Byrnes ISLANDS OF PROFIT IN A SEA OF RED INK](https://profitisle.com/wp-content/uploads/2023/06/pi-book1.png)
Islands of Profit in a Sea of Red Ink
Why 40% of Your Business is Unprofitable, and How to Fix It
“Astonishing but true: Nearly 40% of every company is unprofitable by any measure and 20%-to-30% is so profitable that it provides all the reported earnings and subsidizes the losses.”
Dr. Jonathan Byrnes,
Senior Lecturer at MIT
How We Partner with Customers