Set to have a vacation away from her home life and the tax man, young barrister Julia Larwood takes a trip to Italy with her art-loving boyfriend. But when her personal copy of the current Finance Act is found a few meters away from a dead body, Julia finds herself caught up in a complex fight against the Inland Revenue. Fortunately, she’s able to call on her fellow colleagues who enlist the help of their friend Oxford professor Hilary Tamar. However, all is not what it seems.

Several weeks ago, Chief Inspector Armand Gamache of the Sûreté du Québec and his team uncovered and stopped a domestic terrorist attack in Montréal, arresting the person behind it. A man they called the Black Wolf. But their relief is short-lived. In a sickening turn of events, Gamache has realized that plot, as horrific as it was, was just the beginning. Perhaps even a deliberate misdirection. One he fell into. Something deeper and darker, more damaging, is planned. Did he in fact arrest the Black Wolf, or are they still out there?

Chief Inspector Macdonald has been invited to a treasure hunt party at the house of the Graham Coombe, the celebrated publisher of Murder by Mesmerism. The clues of the hunt have been devised by Coombe's thriller-writer friends, disguised on the night under literary pseudonyms. The fun comes to an abrupt end, however, when 'Samuel Pepys' is found murdered in the telephone room in bizarre circumstances.

After more than a year of laying low, Billie, Helen, Mary Alice, and Natalie are called back into action. They have enjoyed their time off, but the lack of excitement is starting to chafe: a professional killer can only take so many watercolor classes and yoga sessions without itching to strangle someone...literally. When they receive a call from the head of the elite assassin organization known as the Museum, they are ready tackle the greatest challenge of their careers.

Early one morning, a body is found lying next to the railway tracks just outside of Kuki Station in Saitama Prefecture, shot dead. It is identified as belonging to the owner of a local mill which is embroiled in a labour dispute. Suspicion initially falls on the workers' union, then on a new religious sect that has been gaining followers recently. Chief Inspector Onitsura and his assistant Tanna are called in to investigate, and soon set off in a journey across Japan, from Tokyo to Kyoto and Osaka, and finally to the island of Kyushu, in a hunt for the killer.