Billionaire Boss Series
These are much more hardcore than normal Mandy titles. If you want to go beyond this as far as hard, dirty sexy with a kind of happy ending then try the books under the Elle Erotique name (below)
Elle Erotique Books
These are NOT like normal Mandy Roth books. These are hardcore BIG TIME! Don't buy them if you're not into that. Trust us, you won't like them unless you like your sex dirty and gritty with no apologies. THESE ARE SERIALS: That means you don't get your happy ending until the end of the three short stories and these are NOT "romance" as you know romance to be.