By Laurie Rockenbeck Rachel Howzell Hall’s newest offering, And Now She’s Gone, introduces us to newbie private investigator Grayson Sykes. With her wrinkled clothes and easy distractibility, Gray comes across as a latter-day Colombo. She forgets to record interviews, can’t remember to take antibiotics on time, and finding a working pen is beyond her.  In spite of all her fumbling…