Penguin’s eBook global sales grew 128 percent over the last year, and eBooks now represent 14 percent of the company’s total revenue. Titles like Kathryn Stockett’s The Help, Tom Clancy’s Against All Enemies and Joshua Foer’s Moonwalking with Einstein are among Penguin’s bestselling eBooks.

Penguin’s parent company Pearson released these sales figures in its 2011-half year results report. According to the report, Penguin’s overall sales dropped by 4%. However, as a whole, Pearson saw sales up  6% to £2.4 billion with profits up 20% to £208 million.

Education sales were up 9% with profits up 31%. International  sales were up 26% in this category and Professional sales were up 35% for education, which helped drive the growth. Digital sales helped as well, as Pearson’s education digital platform and service registrations were 15%.