Title: The Italian billionaire's secretary mistress
Description: Some editions in **GoodReads gives the wrong synopsis, GoodReads synopsis is for "The Italian's Christmas Secret" also by Sharon Kendrick** 

Riccardo Castellari has never seen Angie as anything other than his mousy secretary - until she flaunts a silky red dress that hangs on her every curve. Now he doesn't just look once but twice! Angie is helpless to refuse one night of exquisite pleasure with Riccardo. But back at work her cheeks are burning. Mortified she tries to resign. But Riccardo has other ideas - in order to leave Angie must see out her notice as his very personal mistress ...

Being the personal secretary to the incredibly handsome, rich Riccardo Castellari is a difficult job--but someone has to do it Yet 27 Angie Patterson's efficiency hides an embarrassing secret: she's been half in love with her boss for years and he's never so much as glanced at her in "that" way. ...

Angie’s handsome boss casually gives her a new dress to wear to the office Christmas party. The outfit gives her new confidence in herself and Riccardo is surprised to realize that she is much more attractive than he had been aware of.   

Connected to other Castellari characters 
His Enemy's Italian Surrender (Roman Castellari  & Kelly Butler) (2025) 
and sister
 Floriana Castellari - married to Max in both books
Subjects: Large type books
People: Riccardo Castellari, Angie Patterson