A man browses books at the 26th Tehran International Book Fair in Tehran, Iran, May 4, 2013. More than 2,500 Iranian and 1,600 foreign companies from 77 countries attended the 11-day book fair. (Xinhua/Ahmad Halabisaz)

A man visits the 26th Tehran International Book Fair in Tehran, Iran, May 4, 2013. More than 2,500 Iranian and 1,600 foreign companies from 77 countries attended the 11-day book fair. (Xinhua/Ahmad Halabisaz)

A woman reads a book at the 26th Tehran International Book Fair in Tehran, Iran, May 4, 2013. More than 2,500 Iranian and 1,600 foreign companies from 77 countries attended the 11-day book fair. (Xinhua/Ahmad Halabisaz)

Iranian women search books at the 26th Tehran International Book Fair in Tehran, Iran, May 4, 2013. More than 2,500 Iranian and 1,600 foreign companies from 77 countries attended the 11-day book fair. (Xinhua/Ahmad Halabisaz)

An Iranian boy with a painting on his face visits the 26th Tehran International Book Fair in Tehran, Iran, May 4, 2013. More than 2,500 Iranian and 1,600 foreign companies from 77 countries attended the 11-day book fair. (Xinhua/Ahmad Halabisaz)