The Hot Wheels Ultimate Redline Guide 1968-1977 by Clark Wicker is a comprehensive hardcover book that serves as a valuable resource for collectors of vintage Hot Wheels diecast vehicles. This book provides detailed information and insights into the iconic Redline models produced by Hot Wheels from 1968 to 1977, making it a must-have for enthusiasts looking to deepen their knowledge of these classic toys. With a focus on the United States market, this guide is a great addition to any collection of toy vehicles.