Scott Specialized United States Postage Catalogue Ser.: Scott 2017 Specialized United States Postage Stamp Catalogue by Donna Houseman (2016, Trade Paperback)
2017 Scott Speciialised Catalogue of USA stamps and Covers
This is the best catalogue on the market for ordinary and professional collectors. It is very comprehensive and easy to understand according to the sequence of the year that the stamps and covers were issued.
The catalogue price of the stamps and covers are quoted reasonably accurate except a few extreme rare stamps that hardly on the market.
A section of 'grading' stamps is the best indicator of value of the stamps.
when purchasing the catalogue, make sure that there is no import duty.
For US Stamp collectors and especially for those with advanced and focused collections, this is the Bible. The information inside is much more than the up to date market values. So much about a United States stamp collection cannot be understood without this catalog!