According to the Prima guide for WA I bought, each location has new and exclusive books, foods, and other items, and some were not mentioned before. 

CHINA

General Store (15 items including three different qualities of dried food, tents, cameras, shower in a can, fireworks, bikes, etc.)
Bookstore (26 new books, including martial arts, fishing, and a new Jimmy Sprockett novel)
Foods (stir-fry and egg rolls)
Special Merchant (8 items, including keys)
Exclusive collectibles (1 beetle, 3 butterflies, 4 gems, 4 metals, 7 meteorites)

FRANCE

General Store (10 items including three different qualities of dried food, tents, cameras, shower in a can, incense, etc.)
Bookstore (23 new books, including nectar-making, fishing, and a new Jimmy Sprockett novel)
Foods (cheese plate, bouillabaisse, crepes, frog legs)
Special Merchant (10 items, including keys)
Exclusive collectibles (3 beetles, 5 butterflies, 5 gems, 4 metals, 7 meteorites)

EGYPT

General Store (14 items including three different qualities of dried food, tents, cameras, shower in a can, snake charming basket, mummified teddy bear, scooter, etc.)
Bookstore (22 new books, including photography, fishing, and a new Jimmy Sprockett novel)
Foods (shawarma and falafel)
Special Merchant (8 items, including keys)
Exclusive collectibles (3 beetles, 3 butterflies, 5 gems, 4 metals, 7 meteorites)

*Exclusive Jimmy Sprockett Novels:

Jimmy Sprockett and the Cave of the Dragon (China)
Jimmy Sprockett and the Chalice of Nectar (France)
Jimmy Sprockett and the Mummy’s Curse (Egypt)

(So you know there will be a new Jimmy Sprockett novel in each EP.  It seems as if that is the most popular novel in Sims world.)