Callahan Billionaires Books in Order
Below you'll find the complete list of Callahan Billionaires books in publication order. This is generally the recommended reading order for the series.
Reading order verified: January 2026
Publication Order
Frequently Asked Questions
The recommended reading order for the Callahan Billionaires series is publication order: 1. By His Vow (2024), 2. By His Rule (2024), 3. By His Play (2025). This is generally the best way to experience the story as the author intended.
The Callahan Billionaires series by Tracy Lorraine contains 3 books. The series began in 2024 and continues to be a popular choice for readers.
The Callahan Billionaires series is written by Tracy Lorraine. You can find more books and series by this author on our website.
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