William Silvester has written a number of handbooks dealing with collecting postage stamps. Amongst these are:
Handbook of Disney on Stamps in four parts; A Philatelic Guide to the Commonwealth Games and
Harry Potter Philatelic Guide.
All of these handbooks are filled with up to date information about these stamp collecting topics and include not only all of the stamps for that topic but also postage meters, cancels, first day covers, and many other aspects of philately.
These handbooks are all available in pdf format from the author. The Handbook of Disney on Stamps - Part 3 and Handbook of Disney on Stamps - Part 4 (5th Editions) and A Philatelic Guide to the Commonwealth Games (2nd Edition) are $11(US) each. Harry Potter Philatelic Guide (2nd Edition) is $6(US) payable through PayPal to email@example.com