Secret Heirs of Billionaires — Multiple Authors

Unwrapping the Castelli Secret
  • # of Books:
    32
  • First Book:
    November 2015
  • Latest Book:
    January 2020
  • Genres:
    Contemporary Category Romance
  • Series Rating:
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The Secret Heirs of Billionaires Series in Order (32 Books)

Order Author Book Series Date Rating
1 HP-3379 4
2 HP-3389 5
3 HP-3424 4
4 HP-3458 4
5 HP-3487 4
6 HP-3502 4
7 HP-3526 4
8 HP-3536 4
9 HP-3541 4


10 HP-3549 4
11 HP-3575 4
12 HP-3603 4
13 HP-3619 4
14 HP-3634 5
15 HP-3642 5
16 HP-3650 5
17 HP-3658 4.5
18 HP-3666 5
19 HP-3674 5
20 HP-3681 4
21 HP-3690 4
22 HP-3697 4
23 HP-3706 4
24 HP-3713 4
25 HP-3722 4
26 HP-3732 4
27 HP-3738 5
28 HP-3747 4
29 HP-3754 5


30 HP-3765 4
31 HP-3771 2
32 HP-3777 4

Frequently Asked Questions (FAQ)

There are 32 books in the Secret Heirs of Billionaires series.

The Secret Heirs of Billionaires series does not have a new book coming out soon. The latest book, The Italian's Unexpected Baby (Book 32), was published in January 2020.

The first book in the Secret Heirs of Billionaires series, Unwrapping the Castelli Secret, was published in November 2015.

The Secret Heirs of Billionaires series primarily falls into the Contemporary Category Romance genre.