This book The Sweet Dews of Ch’an (Zen) by Reverend Cheng Kuan is a series of lectures and instructions on practical Zen meditation given at Chuang Yen Monastery
As an outcome of Dhyana, you will be able to observe these phenomena very clearly because your “mental mirror” is very clear… for there are no more disturbances to veil it. Out of these observations will come Transcendental Wisdom, which in Sanskrit is called “Prajna.” Download it here (92 pages):
The Sweet Dews of Ch’an (Zen)