It's a good news that the well-known Kvisoft FlipBook Maker Pro is provided on its Christmas promotion page with 50% off price: http://www.kvisoft.com/christmas-discount-promotion.html.
Details about Kvisoft Christmas Special Offer
1. Time: the special deal is only valid until Jan5th, 2014.

2. Price: each product is 50% off. Take Kvisoft FlipBook Maker Pro(an emagazine software) for example, its original price is $297, now it is $148.5 only.

3. Other policy: after the purchasement, all the users can enjoy free update forever.