Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | The Unexpected Mistress | 2001 | Lynne Graham | Buy |
| 2 | The Secret Valtinos Baby | 2018 | Lynne Graham | N/A |
| 3 | Zipper: An Exploration in Novelty | 1994 | Lynne Graham | N/A |
| 4 | The Billionaire Affair | 2002 | Lynne Graham | Buy |
| 5 | In the Billionaire’s Bed | 2003 | Lynne Graham | Buy |
| 6 | Da Rocha’s Convenient Heir | 2018 | Lynne Graham | N/A |
| 7 | Passion in Secret | 2003 | Lynne Graham | Buy |
| 8 | His Mistress’s Secret | 2003 | Lynne Graham | Buy |
| 9 | His Bought Mistress | 2004 | Lynne Graham | Buy |
| 10 | Mistress at a Price | 2004 | Lynne Graham | Buy |
| 11 | The Millionaire Boss’s Mistress | 2004 | Lynne Graham | Buy |
| 12 | At the Italian’s Command | 2005 | Lynne Graham | Buy |
| 13 | The Mediterranean Millionaire’s Mistress | 2006 | Lynne Graham | Buy |
| 14 | His Private Mistress | 2006 | Lynne Graham | Buy |
| 15 | Mistress Bought and Paid For | 2006 | Lynne Graham | Buy |
| 16 | Mistress on Demand | 2006 | Lynne Graham | Buy |
| 17 | The Frenchman’s Captive Wife | 2006 | Lynne Graham | Buy |
| 18 | His Secretary Mistress | 2006 | Lynne Graham | Buy |
| 19 | The Italian Boss’s Secretary Mistress | 2006 | Lynne Graham | Buy |
| 20 | Mistress for a Weekend | 2006 | Lynne Graham | Buy |
| 21 | A Mistress for the Taking | 2006 | Lynne Graham | Buy |
| 22 | The Frenchman’s Marriage Demand | 2007 | Lynne Graham | Buy |
| 23 | The Greek Millionaire’s Mistress | 2007 | Lynne Graham | Buy |
| 24 | The Italian’s Defiant Mistress | 2007 | Lynne Graham | Buy |
| 25 | Kept by the Spanish Billionaire | 2007 | Lynne Graham | Buy |
| 26 | Bought for the Sicilian Billionaire’s Bed | 2008 | Lynne Graham | Buy |
| 27 | One-Night Love Child | 2008 | Lynne Graham | Buy |
| 28 | The Italian’s Pregnant Mistress | 2008 | Lynne Graham | Buy |
Mistress to a Millionaire is one of Graham’s largest themed collections, with 28 romances spanning from 2001 to 2022. The books feature heroines in mistress arrangements with wealthy men, exploring the power dynamics and emotional complications that arise when love enters a transactional relationship.
Titles like The Unexpected Mistress, His Private Mistress, and Mistress Bought and Paid For are typical of the series. The setup creates built-in tension as heroines navigate relationships where money and desire are tangled together.