Total sales in the children’s/young adult segment rose 13.0% in 2012, to $3.70 billion, according to figures released by BookStats, the statistical program run by the Association of American Publishers and the Book Industry Study Group. Units were up 10.8% in the year, to 791.4 million. E-book sales had the biggest gain in the year within the segment, jumping 117%, to $469.2 million. E-books accounted for 12.6% of all children’s/young adult sales last year up from 6.5% in 2011.

For the entire trade segment, sales rose 6.9%, to $15.05 billion, with e-book sales up 44.2%. E-books represented 20% of total trade sales last year, according to BookStats.