Viking River UK just released some fairly compelling Special Offers for couples who book early.

2010 Early Booking Discounts
Book by 30 December 2009 and save the following amounts on 2010 brochure prices:
Save £1000 per couple on:
Imperial Jewels of China, Roof of the World

Save £800 per couple on:
Waterways of the Tsars, Footsteps of the Cossacks

Save £700 per couple on:
Tulips and Windmills, Treasures of the Rhine, Grand European Tour, Eastern European Odyssey, Rhine Discovery, Majestic Rhine, Castles and Wine, Romantic Danube, Danube Discovery, Danube Waltz, Danube Rhapsody, Danube Explorer, Elegant Elbe, Paris & the Heart of Normandy, Portraits of Southern France, China’s Cultural Delights

Save £400 per couple on:
Christmas and New Year on the Rhine,
Christmas and New Year on the Danube

Save £200 per couple on:
A Taste of the Rhine (4 nights)

Save £150 per couple on:
A Taste of the Rhine (3 nights)
These offers are subject to availability and cannot be combined with any other special offer or promotion. If you are a single traveller you qualify for 50% of the discount stated above. Bookings must be made by 30 December 2009.