平安夜，一个女人死在自家浴室，墙上留有"蛋糕"字样。警方判定自杀可能性很小，但现场既没有别人出入的痕迹，也没发现凶器。侦查陷入困境。
女老师竹内忍没想到自己竟会和这个案子有关。她打算带着学生一起过圣诞节，买来了蛋糕，却在里面发现了一把刀，上面的血迹和遇害女人的血型一致。凶器究竟来自哪里？忍老师偶然看到遇害女人的一张照片，不禁眼前一亮：照片上四个人看似正常，表...
Availability can change throughout the month based on the library's budget. You can still place a hold on the title, and your hold will be automatically filled as soon as the title is available again.
The OverDrive Read format of this ebook has professional narration that plays while you read in your browser. Learn more here.
Your session has expired. Please sign in again so you can continue to borrow titles and access your Loans, Wish list, and Holds pages.
If you're still having trouble, follow these steps to sign in.
Add a library card to your account to borrow titles, place holds, and add titles to your wish list.
Have a card? Add it now to start borrowing from the collection.
The library card you previously added can't be used to complete this action. Please add your card again, or add a different card. If you receive an error message, please contact your library for help.