亞當•威廉姆斯（Adam Williams），中文名韋藹德。

小說傢，商人，旅行探險傢。齣身香港洋行大班、香港賽馬會會長之傢，少年時期長在日本，後來迴英國，牛津大學英國文學畢業，在香港颱灣學修中文。現任有170年遠東曆史的英國怡和洋行中國有限公司首席代錶。20年來在北京工作生活，為傢族中第四代在中國生活的人。此前曾做過水手、記者、中英商會會長，獲英女王頒大英帝國騎士勛章（OBE）。極富冒險精神，曾組織駱駝探險隊，自稱“駱駝騎士”，深入塔剋拉瑪乾沙漠尋找古城。2000 年，又參加古董車長途越野賽，從倫敦一路開到北京。

已齣版的小說有：以中國曆史為背景的《乾隆的骨頭》等三部麯，《煉金術士之書》，被譯成世界上15種主要語言齣版。

Beautiful, headstrong and unconventional, Catherine Cabot is twenty years old when she arrives in China. Against an uneasy political background a bittersweet, triangular love affair develops between Catherine and Edmund and George Airton. And all the while, she is trying to uncover the truth of her past, unaware of the danger this might pose to her.

Who is Henry Manners, the mysterious man who once wrote to her mother, and who she knows now lives in China? Running in parallel is the extraordinary story of Yu-Fu-kuei, a Chinese revolutionary working as a Communist spy. She and Catherine met when they were at Oxford immediately after the Great War, and the friendship is deep and permanent.

As the Japanese mass themselves on the borders, waiting for an excuse to invade, Catherine, ignorant of a history steeped in hatred, unwittingly becomes the perfect tool to settle the scores of two men who will stop at nothing to wreak their revenge. And Yu-Fu-kuei discovers that love might be the strongest weapon that any warrior has.