Casper ten Boom is the father of a dutch watchmaker who wrote which book ?
Casper ten Boom:  He is the father of Betsie and Corrie ten Boom, who also aided the Jews and were sent to Ravensbrück concentration camp where Betsie died. Corrie ten Boom:  Her most famous book, "The Hiding Place", is a biography that recounts the story of her family's efforts, as well as her time spent in a concentration camp.
The Hiding Place