Critics say the act's broad description of what the FCC should take into account in its definition could mean a huge number of sites will be blocked by libraries.

BBC: Many schools have already banned social network sites

Mr Szpilman's account of the years in between is a tribute to the power of description and of music.

ECONOMIST: General non-fiction

The pages removed included such sensitive material as a description of his children's games at Hallowe'en, and an account of a holiday in the English Lake District.

ECONOMIST: Glenn Seaborg