First published in 1980 and subsequently translated into many languages, Chasing the Dragon tells the story of how God brought Jackie to Hong Kong and led her to the Walled City. As she spoke of Jesus Christ, triad gang leaders were converted and she found a new treatment for drug addiction: baptism in the power of the Holy Spirit. Chasing the Dragon is the compelling story of a life completely surrendered to God.

Crack in the Wall is a follow up to Chasing the Dragon published 9 years later. Through photographs and interviews it tells the individual stories of some of the ex-addicts and Triad gang members who met Jesus in the Walled City and have now given their lives to telling others about Jesus. Crack in the Wall is no longer in print.

The story of Chasing the Dragon re-told for the first time as a Manga-style graphic novel, published in both Chinese and English (2007).