The Billionaires of Blackcastle Series Novels

His Pregnant Christmas Bride (The Billionaires of Blackcastle 6) by Olivia Gates
Billionaire Boss, M.D. (The Billionaires of Blackcastle 5) by Olivia Gates
Claiming His Secret Son (The Billionaires of Blackcastle 5) by Olivia Gates
Pregnant by the Sheikh (The Billionaires of Blackcastle 3) by Olivia Gates
Scandalously Expecting His Child (The Billionaires of Blackcastle 2) by Olivia Gates
From Enemy's Daughter to Expectant Bride (The Billionaires of Blackcastle 1) by Olivia Gates