Start with high-confidence taoist thought books, then narrow by subgenre or adjacent topics.
The Secret of the Golden Flower
Richard Wilhelm, C. G. Jung
The Way of Chuang Tzu
Thomas Merton, Dalai Lama XIV
Taoism
Eva Wong
Tao Te Ching
Lao-Tse
Tao Te King
Sayings of Lao Tzu
Lao Tzu