An excellent player’s guide!
I have all the racial player companions which are perfect for my purposes and “Humans of Golarion” is no exception!
As I, the GM, am making last minute preparations before game time and some or all of the players have selected their pre-generated characters I say, “Great, I see you selected the “___________”. Here is the player companion about that race. Skim through here if you like and it will briefly explain how your character fits racially into this setting.” My players love it! Also these books are indispensable at convention games.
Now that I have “Humans of Golarion” I can now say “Great, I see you selected the Human character. There are several ethnicities to choose from to add variety in appearance, depth in character background, and some unique traits to your otherwise cookie cutter “human”.
My players do not want to read the Inner Sea Campaign Setting book, they want to "Kill things and take their stuff!" So 32 pages let’s you get right to the point. As the GM, I would love for the book to go on and on with pages of feats, spells, and traits but this book isn't for me, it is for the players.
This has inspired me to run an adventure comprised of human characters each from 4 – 6 of the 12 different ethnic groups.