December 25 and 26 were the two biggest e-book sales days ever for Random House, the publisher reported today. Combined e-book sales across e-retailers on those two days rose more than 300% over last year's sales for the same two-day period, which had been Random's best two-day e-book sales period ever.

Among Random’s e-book bestsellers were the titles in Stieg Larsson's Millennium Trilogy (with a combined 115,000 units sold in e-book format across e-retailers), John Grisham's The Confession, George Bush's Decision Points, Laura Hillenbrand's Unbroken, and Markus Zusak's The Book Thief. Random also reported a “significant” sales increase for e-book versions of its children's picture books, including the 1961 classic Go, Dog, Go.

Random's president of sales, digital and operations, Madeline McIntosh, said, “We are delighted by the volume of consumers flocking to Random House books across all our e-retailers, and not just to our best-selling titles which are clearly as popular in e as they are in print. Consumers are also using their e-reading devices to discover titles deeper in our list, including David Nicholls's One Day, George R. R. Martin's A Game of Thrones,and Max Brooks's World War Z."