Culture Shock! : Vietnam - By Claire Ellis

Lonely Planet Vietnam (4th Ed) - By Robert Storey, Daniel Robinson - Good gift book about Vietnam.  Describes each region and city of the country.  Has a nice section on how to get around Vietnam.

Lonely Planet Vietnamese Phrasebook - By Nguyen Xuanthu, Nguyen Xuan Thu

Look What We've Brought You From Vietnam - By Phyllis Shalant, Joanna Roy (Ages 8+) - Crafts, games, recipes, stories and other cultural activities.

Passport Vietnam : Your Pocket Guide to Vietnamese Business, Customs & Etiquette - By Jeffrey E. Curry, Molly Thurmond, Chinh T. Nguyen, Barbara Szerlip (Editor), Tom Watson (Illustrator)