Air New Zealand is offering a free Lonely Planet ebook on New Zealand simply by inputting your name, email address, and booking number. The fine print says

Promo codes are offered to Air New Zealand passengers who make a booking from North America to New Zealand at www.airnewzealand.com or www.airnewzealand.ca from 11 April 2014 thru 30 June 2014 or while supplies last.

Booking references for Air New Zealand will end in H: For bookings made online directly with Air New Zealand or through our Contact Centre, the Booking Reference can be found on your Electronic Ticket Itinerary and Receipt. The Booking Reference will have 6 letters / numbers, ending in the letter H, for example: MFB7EH.

Tip of the Hat to reader Sice