Murder on the half shelf / Lorna Barrett.

Enhanced descriptions from Syndetics:

"If anyone has the formula for a frolicking fun mystery down pat, it's Lorna Barrett" ( Roundtable Reviews ), the New York Times bestselling author whose latest Booktown Mystery finds amateur sleuth Tricia Miles unexpectedly reunited with a man from a chapter of her life she closed long ago...

Stoneham, New Hampshire, is a haven to bookstores, including Tricia's own mystery shop, Haven't Got a Clue, but is sadly lacking in bed and breakfasts. Pippa and Jon Comfort's Sheer Comfort Inn opens its doors to the public in a week and the couple has offered some locals a free night as a trial run.

But what should have been a pleasant overnight stay for Tricia becomes a nightmare when she makes two startling discoveries: Pippa's murdered body in the backyard, and the fact that her husband Jon is actually Harry Tyler, a man Tricia loved--and believed dead--for nearly twenty years.

Now Harry is the prime suspect, but Tricia doesn't believe him capable of murder, regardless of her own feelings toward him. And even though Harry's led a life of lies, Tricia's learning that Pippa had her share of secrets that some people may have not wanted revealed...