Just received my copy of the 4th edition of Hot Wheels Variations, The Ultimate Guide. I gotta say, this is the best edition on Variations I've ever seen! Author Michael Zarnock has really outdone himself here! The pictures are so cool, and the listings are precise, detailed, and accurate. I think the cover with the Mike Zarnock car is fantastic. There's more about the Zarnock car on page 5. Zarnock is a pioneer in this area of Hot Wheels, and I think it's really neat that Mattel honored Zarnock for his contributions to the hobby by producing a Hot Wheels replica of the dragster he raced with years ago. There's so much great stuff packed in here - 5,500 cars and 3,100 photos. If you are a Hot Wheels variations collector like me, THIS is the book you need to have. You need not look no further than this bible on variations!