Series numeration from Fantastic Fiction.

"Beloved heroine Jane Lawless finds that some secrets don't stay buried forever in Mystery Writers of America Grandmaster Ellen Hart's In a Midnight Wood, the 27th mystery in this cultishly popular series. Minnesota private investigator Jane Lawless is headed to the small town of Castle Rock for a little getaway. She and Cordelia plan to visit an old friend, participate in an arts festival, and look into a cold case that has recently come on Jane's radar-thanks to a podcast Jane is now involved in which looks into Minnesota cold cases. In Castle Rock, a high school senior named Sam went missing in 1999. Everyone thought he ran away, though the town rumor mill has always claimed the father killed him. In present day, within a week of his 20th high school reunion, Sam's remains are found. People who knew Sam, and those around him, will be in town for the much anticipated reunion. It's up to Jane to sort friend from foe, before it's too late."-- Provided by publisher.