You can buy a book of any author coming this fall at a 30 to 35% discount—whether it’s Order to Kill by Kyle Mills or Sing for Your Life by Daniel Bergner. Just go to cityoperahouse.org, find the author you like, and choose “tickets.” There you’ll find the book order form. You don’t even need to buy an event ticket. The Opera House will send you a voucher, which you can redeem at Horizon Books on Front St. Why the great deal? We know that NYC publicists send the biggest authors to the venues who sell the most books. So we’re offering the absolute best deal around, Amazon included. So take advantage and buy a book!