Lagardère Publishing, the company that owns the Hachette Book Group, reported its first half of 2011 sales figures yesterday, and revealed that eBook sales now represent 5% of total net sales throughout the company.

The company saw sharp growth in eBook sales in English-speaking countries during the first half of this year. In the US, eBooks accounted for 20% of net sales in the trade segment. In the UK, eBooks accounted for 8% of net sales in the trade segment. Both countries doubled their eBook net sales figures from last year.

Lagardère Publishing reported €900 million in revenues in the first half of 2011, down 6% on a like-for-like basis from 2010. The company attributed these figures to “expected decline in sales of the last book in the Stephenie Meyer series, significant progress in eBooks in English-speaking countries and solid performances in France by the General Literature and Education segments.”