《白镜》(The White Mirror)，美国作家艾尔莎·哈特(Elsa Hart)著清朝推理小说系列第二本。

《白镜》中，此前被流放的翰林院学士李杜已经获得自由，他随一个前往拉萨市的商队朝着茶马古道继续深入。恶劣的暴风雪使他们转道，来到深藏在崇山峻岭中的大峡谷。眼前的木头桥上端坐着一具和尚尸体，身上的伤口看起来是自杀，袈裟已被撕裂，胸口画上了神秘的符号。

为了躲避暴风雪，商队留宿在当地的一个大庄园。在那里，李杜了解到的信息让他不禁怀疑，和尚自杀并不是表面看上去那么简单。为什么商队头领要特意转道来此峡谷？为什么庄园主的继承人要像仆人一样住在牲畜棚里？一个又一个的问题等着李杜去寻找答案。

In The White Mirror, the follow-up to Elsa Hart’s critically acclaimed debut, Jade Dragon Mountain, Li Du, an imperial librarian and former exile in 18th century China, is now an independent traveler. He is journeying with a trade caravan bound for Lhasa when a detour brings them to a valley hidden between mountain passes. On the icy planks of a wooden bridge, a monk sits in contemplation. Closer inspection reveals that the monk is dead, apparently of a self-inflicted wound. His robes are rent, revealing a strange symbol painted on his chest.

When the rain turns to snow, the caravan is forced to seek hospitality from the local lord while they wait for the storm to pass. The dead monk, Li Du soon learns, was a reclusive painter. According to the family, his bizarre suicide is not surprising, given his obsession with the demon world. But Li Du is convinced that all is not as it seems. Why did the caravan leader detour to this particular valley? Why does the lord’s heir sleep in the barn like a servant? And who is the mysterious woman traveling through the mountain wilds?

Trapped in the snow, surrounded by secrets and an unexplained grief that haunts the manor, Li Du cannot distract himself from memories he’s tried to leave behind. As he discovers irrefutable evidence of the painter’s murder and pieces together the dark circumstances of his 死亡, Li Du must face the reason he will not go home and, ultimately, the reason why he must.

艾尔莎·哈特(Elsa Hart)的第一本推理小说《玉龙雪山》(Jade Dragon Mountain)出版后，那个发生在清朝康熙丽江古城的侦探推理故事大获好评。主人公李杜在糟糕的风雪天里继续朝着大山深处行进，在小说续集中续写精彩的故事。

据美国之音电台网站9月15日报道，这本《玉龙雪山》获得了一些西方读者的好评，在感受小说神秘与惊险的同时，也打开了通往中国古代历史的大门。2016年9月，哈特推出了她的系列小说第二本《白镜》(The White Mirror)。

Elsa Hart was born in Rome, Italy, but her earliest memories are of 莫斯科, where her family lived until 1991. Since then she has lived in the Czech Republic, the 南阿拉巴马大学, and China. She earned a B.A. from Swarthmore College and a J.D. from Washington University in St. Louis School of Law. She wrote Jade Dragon Mountain in Lijiang, the city formerly known as Dayan. It is her first novel.