Mr. Duncan wrote bad checks. (What kind)
Mr. Duncan has written a book. (What)
The name of his book is A Casino Is Born Every Minute. (What)
The book has 250 pages. (How many)
Mr. Duncan is serving five years. (How many)
A bogus check is a bad check. (What)
Duncan made almost $1 million at blackjack. (How much)
Other card sharks started copying his technique. (What)
Other card sharks started copying his technique. (Who)
Other card sharks abused the system. (What)