Radical Zen
The sayings of Joshu.
WHERNTO: heedism erudite notions operate

An intriguing book with many items about and attributed to Joshu.
… many of our standard stereotypes of the Zen Master can be
traced to this figure–irascible and blunt, down-to-earth and practical,
prone to answer religious questions with seemingly off-the wall
non-sequiturs and paradoxes if not a good sharp smack in the face.
Amazon
(Also available for previewing as a pdf from here.)