Traces of Grey: Book Four of The Alexis Stanton Chronicles (Volume 4)

Everyone has secrets... A mysterious ad. A job she could just die for. And now, a life she's perfectly suited to. Alexis has it all, including her very own alias, Ms. Grey. That is until White is shot and Alex feels the need to stay by his side while he recovers. Nursing White back to health for the past two months has prevented her from taking on any new projects. So she's more than ready to get back to work when White offers her a simple surveillance job. The basic op turns up something from the past, putting extra pressure on White, and cutting Alex off the elite need-to-know list.