I am always a sucker for a forbidden romance with best friend's sister so this was right up my alley. Harrison was asked to help watch Luna, his best friend's sister and somehow they end up being crazy attracted to each other. Luna is smart, full of sass and a total opposite of Harrison. 

There's a bit of mystery and suspense in this story which added an interesting element. I also liked that characters from Suddenly Broken duet played a part in this story too. 

Jason Clark and Stephanie Németh Parker both brought out the characters to life. 

Thank you @hambright.pr for a copy of the audiobook.