4 Stars! This is the 3rd book in ‘A Duke’s Heiress’ series and can be read as a standalone. I did read the 2nd book but that was awhile ago so I only remember bits and pieces from it. This book gives the gist of what happened in the previous books so you won’t be lost. I do believe this is the final book in the series & I wish there had been an epilogue that expanded on the 3 books main characters HEA’s. This books main characters were the Duke/Nicolas & Iris Barrington. I liked both of them. Iris isn’t your typical virginal debutante since she’s not a debutante nor a virgin! This book has mystery, attempted murders, plotting, books, friendship, sexy times, decades old secrets, some witty flirting all wrapped up with a HEA ending. *I received this at no charge & I voluntarily left this review.*