Secret Heirs of Billionaires is a 32-book series with 32 released primary works first released in 1999 with contributions by Caitlin Crews, Maya Blake, Amanda Cinelli, Kate Hewitt, Annie West, Maggie Cox, Sara Craven, Andie Brock, Susan Stephens, Jennie Lucas and 12 others.
This multi-author series from Mills & Boon/Harlequin is a collection of books written about a similar theme.
They can be enjoyed in any order -- but in some cases the author has included the book in a continuing series -- so you may wish to read those series, separately... ENJOY!