Lindblad Expeditions has announced Book 4 & Explore, a travel agent program that rewards travel agents who book four cabins on select Galápagos voyages on the National Geographic Endeavour and the National Geographic Islander with a complimentary expedition for themselves and a travel companion.

The Book 4 offer is valid on bookings made by March 31, 2012 on any Galápagos departure from January through June 30, 2012. Travel Agents then have one year to take their complimentary Galapagos expedition for two onboard the National Geographic Endeavour in a category 2 cabin on a departure through June 30, 2013. Blackout periods may apply.

Agents should go to www.expeditions.com/book4andexplore to complete their client bookings. As soon as four bookings are entered, they will receive an email certificate for a complimentary voyage of their choice to Galápagos.

Travel agents can also find it easier to book 4 cabins with Lindblad Expeditions’ Galapagos free air offer – book an expedition before March 31, 2012 and receive complimentary roundtrip air on select January – June 2012 departures from either New York or Miami to Galápagos or upgrade to business class on the New York/Guayaquil flights for only $500 round-trip. This offer is limited to new bookings only and subject to availability.

Lindblad Expeditions, 800-397-348, www.expeditions.com/agents