Secret Heirs Of Billionaires
- Author: Various Authors. See below.
- Publisher: US - Harlequin Presents
- UK - Mills & Boon Modern Romance
- Brazil - Harlequin Paixão Ardente and Harlequin Jessica Minissérie
- Year: 2015 - presemt
- Setting:
- Number Of Books In Series: 28 (at the moment)
Books (Orded By Release)
1. Unwrapping The Castelli Secret - Caitlin Crews
- BR Title: Sentimentos Mascarados
- 2015, November (Harlequin Presents #3379)
- 2015, November (Mills & Boon Modern Romance #1535)
- 2016, July (Harlequin Jessica Minissérie #08)
2. Brunetti's Secret Son - Maya Blake
- BR Title: Coração Intocado
- 2015, December (Harlequin Presents #3389)
- 2015, December (Mills & Boon Modern Romance #1546)
- 2016, December (Harlequin Paixão Ardente #13)
3. The Secret To Marrying Marchesi - Amanda Cinelli
- BR Title: União Avassaladora
- 2016, April (Harlequin Presents #3424)
- 2016, April (Mills & Boon Modern Romance #1580)
- 2017, January (Harlequin Paixão Ardente #14)
4. Demetriou Demands His Child - Kate Hewitt
- BR Title: Segredo Precioso
- 2016, September (Harlequin Presents #3458)
- 2016, September (Mills & Boon Modern Romance #1614)
- 2017, February (Harlequin Paixão Ardente #15)
5. The Desert King's Secret Heir - Annie West
- BR Title: Amor Único
- 2016, December (Harlequin Presents #3487)
- 2016, December (Mills & Boon Modern Romance #1643)
- 2017, March (Harlequin Paixão Ardente #16)
6. The Sheikh's Secret Son - Maggie Cox
- BR Title: Amor Profundo
- 2017, February (Harlequin Presents #3502)
- 2017, February (Mills & Boon Modern Romance #1659)
- 2017, April (Harlequin Paixão Ardente #17)
7. The Innocent's Shameful Secret - Sara Craven
- 2017, May (Harlequin Presents #3526)
- 2017, May (Mills & Boon Modern Romance #1681)
8. The Greek's Pleasurable Revenge - Andie Brock
- 2017, June (Harlequin Presents #3536)
- 2017, June (Mills & Boon Modern Romance #1692)
9. The Secret Kept From The Greek - Susan Stephens
- 2017, July (Harlequin Presents #3541)
- 2017, July (Mills & Boon Modern Romance #1698)
10. Carrying The Spaniard's Child - Jennie Lucas
- 2017, August (Harlequin Presents #3549)
- 2017, August (Mills & Boon Modern Romance #1707)
11. Kidnapped For The Tycoon's Baby - Louise Fuller
- 2017, November (Harlequin Presents #3575)
12. The Greek's Secret Son - Julia James
- 2018, March (Harlequin Presents #3526)
- 2018, March (Mills & Boon Modern Romance #1755)
13. Claiming His Hidden Heir - Carol Marinelli
- 2018, May (Harlequin Presents #3619)
- 2018, May (Mills & Boon Modern Romance #1770)
14. The Secret The Italian Claims - Jennie Lucas
- 2018, July (Harlequin Presents #3634)
- 2018, July (Mills & Boon Modern Romance #1789)
15. Wed For His Secret Heir - Chantelle Shaw
- 2018, August (Harlequin Presents #3642)
- 2018, August (Mills & Boon Modern Romance #1795)
16. The Heir The Prince Secures - Jennie Lucas
- 2018, September (Harlequin Presents #3650)
- 2018, September (Mills & Boon Modern Romance #1803)
17. The Italian's Unexpected Love-Child - Miranda Lee
- 2018, October (Harlequin Presents #3658)
- 2018, October (Mills & Boon Modern Romance #1814)
18. The Baby The Billionaire Demands - Jennie Lucas
- 2018, November (Harlequin Presents #3666)
- 2018, November (Mills & Boon Modern Romance #1819)
19. Married Of His One-Night Heir - Jennifer Hayward
- 2018, December (Harlequin Presents #3674)
- 2018, December (Mills & Boon Modern Romance #1828)
20. The Secret Keep From The Italian - Kate Hewitt
- 2019, January (Harlequin Presents #3681)
- 2019, January (Mills & Boon Modern Romance #1837)
21. Demand His Secret Son - Louise Fuller
- 2019, February (Harlequin Presents #3690)
- 2019, February (Mills & Boon Modern Romance #1843)
22. The Sheikh's Secret Baby - Sharon Kendrick
- 2019, March (Harlequin Presents #3697)
- 2019, March (Mills & Boon Modern Romance #1849)
23. The Sicilian's Secret Son - Angela Bisell
- 2019, April (Harlequin Presents #3706)
- 2019, April (Mills & Boon Modern Romance #1860)
24. Claimed For The Sheikh's Shock Son - Carol Marinelli,
- 2019, May (Harlequin Presents #3713)
25. Shock Heir For The King - Clare Connelly
- 2019, June (Harlequin Presents #3722)
26. Demanding His Hidden Heir - Jackie Ashenden
- 2019, July (Harlequin Presents #3732)
27. The Maid's Spanish Secret - Dani Collins
- 2019, August (Harlequin Presents #3738)
28. Sheikh's Royal Baby Revelation - Annie West
- 2019, September (Harlequin Presents #3747)