Rachel's books

Bette is quitting her job and is caught while leaving her resignation letter.  There happens to be a mole at the firm and since she is resigning- it MUST be her!  So instead of coming right out and saying why she is leaving, she doesn't.  'Cause that would be too damn easy.  So, lets play a game of seduction instead.  'Cause it's sexier don't cha know?  Another boss/employee trope (or in this case soon to be ex).  I didn't like Simon and nothing he did made me like him.  And the mole is?  (To be solved in another book).