Scott 2003 U.S. First Day Cover Catalogue & Checklist by Michael A. Mellone (2002, Paperback)

This is a very useful guide for the collector of US First Day Covers, but it will not be viewed as a "must have" by everyone.
The negatives:
1. The book does not contain a photo for every Scott Catalogue number
2. The photos provided often appear several pages away from the item description
3. All photos are in black and white.
4. The binding is tight making the book spring shut... The pages will not lay flat.
The positives:
1. The first 47 pages contain introductory information of value to a FDC collector.
2. The Cachet Calculator lists several hundred cachet makers and provides a multiplier that allows you to calculate the relative value of each maker's FDCs.
3. The guide provides listings for cacheted plate number coil FDCs, WWII Patriotic Covers, and other material not covered in the Scott Specialized Catalogue
4. The book's small size makes it easy to take to stamp shows, etc.
5. The book is reasonably priced