For Beginners:

1. “The World Encyclopedia of Stamps & Stamp Collecting” by James Mackay

   • A comprehensive guide covering the basics of stamp collecting, history, and notable stamps worldwide.

2. “The Complete Idiot’s Guide to Stamp Collecting” by Lisa Slovick

   • A beginner-friendly guide that covers stamp collecting fundamentals, including terminology, tools, and starting a collection.

3. “100 Greatest American Stamps” by Donald J. Sundman

   • Introduces beginners to some of the most significant and visually appealing American stamps.
     
     

Intermediate Level:

4. “Scott Standard Postage Stamp Catalog“

   • An essential catalog providing detailed listings and values for stamps worldwide. Published annually, it’s an invaluable reference for collectors.

5. “Stamp Collecting as a Pastime” by Edward J. Nankivell

   • Explores the joy of stamp collecting and offers insights into the history of postage stamps.

6. “Collecting Stamps: A Beginner’s Guide” by Robin Ellis

   • Builds on the basics and provides practical tips for organizing, preserving, and expanding a stamp collection.
     
     

Advanced Collectors:

7. “The Complete Guide to Stamps & Stamp Collecting” by James Watson

   • Suitable for collectors at all levels, it delves into advanced topics such as rare stamps, errors, and specialized collecting.

8. “The Philatelic Book of Secrets” by Martin Kent Miller

   • Explores advanced techniques in stamp collecting, including expertizing, authentication, and specialized collecting areas.

9. “Linn’s Stamp News” (Magazine)

   • A leading philatelic publication that covers news, features, and in-depth articles for collectors of all levels.