Mark J. Silen was born in South Dakota, but has lived in Texas all his life. He is an inventor and former nurse who was forced into retirement after being hit by a drunk driver in ...mehr sehenMark J. Silen was born in South Dakota, but has lived in Texas all his life. He is an inventor and former nurse who was forced into retirement after being hit by a drunk driver in 2001. He currently writes full-time. This is his first book.weniger sehen