Affiliate Disclosure: Links on this page may earn us a commission at no extra cost to you. Read our affiliate policy
Secret Heirs of Billionaires Books in Order
Below you'll find the complete list of Secret Heirs of Billionaires books in publication order. This is generally the recommended reading order for the series.
Reading order verified: April 2026
Quick Answer
What order should I read the Secret Heirs of Billionaires series? Start with "Unwrapping the Castelli Secret (By: Caitlin Crews)" (2015) and follow publication order through all 32 books.
The complete Secret Heirs of Billionaires reading order is listed below in publication sequence.
Publication Order
Unwrapping the Castelli Secret (By: Caitlin Crews)
2015
Brunetti's Secret Son/ Christmas at the Chatsfield (By: Maya Blake)
2015
The Secret to Marrying Marchesi
2016
Demetriou Demands His Child (By: Kate Hewitt)
2016
The Desert King's Secret Heir (By: Annie West)
2016
The Sheikh's Secret Son (By: Maggie Cox)
2017
The Innocent's Shameful Secret (By: Sara Craven)
2017
The Greek's Pleasurable Revenge (By: Andie Brock)
2017
The Secret Kept from the Greek (By: Susan Stephens)
2017
Carrying the Spaniard's Child (By: Jennie Lucas)
2017
Kidnapped for the Tycoon's Baby (By: Louise Fuller)
2017
The Greek's Secret Son (By: Julia James)
2018
The Baby the Billionaire Demands (By: Jennie Lucas)
2018
Claiming His Hidden Heir (By: Carol Marinelli)
2018
Demanding His Hidden Heir (By: Jackie Ashenden)
2018
The Secret the Italian Claims (By: Jennie Lucas)
2018
Wed for His Secret Heir (By: Chantelle Shaw)
2018
The Heir the Prince Secures (By: Jennie Lucas)
2018
The Italian's Unexpected Love-Child (By: Miranda Lee)
2018
Married for His One-Night Heir (By: Jennifer Hayward)
2018
The Secret Kept from the Italian (By: Kate Hewitt)
2018
Demanding His Secret Son (By: Louise Fuller)
2019
The Sheikh's Secret Baby (By: Sharon Kendrick)
2019
The Sicilian's Secret Son (By: Angela Bissell)
2019
Claimed for the Sheikh's Shock Son (By: Carol Marinelli)
2019
Shock Heir for the King (By: Clare Connelly)
2019
The Maid's Spanish Secret (By: Dani Collins)
2019
Sheikh's Royal Baby Revelation (By: Annie West)
2019
Cinderella's Scandalous Secret (By: Melanie Milburne)
2019
Unwrapping the Innocent's Secret (By: Caitlin Crews)
2019
Proof of Their One-Night Passion (By: Louise Fuller)
2019
The Italian's Unexpected Baby (By: Kate Hewitt)
2019
Affiliate Disclosure
As an Amazon Associate, Reading Order Books earns from qualifying purchases. When you buy through links on our site, we may earn an affiliate commission at no additional cost to you. This helps us maintain the site and continue providing reading order guides. Read our full disclosure