Anders Behring Breivik would like butter, a new pen, more comfortable handcuffs and a view.

Mr. Breivik, the Norwegian extremist convicted of the coldly premeditated murders of 77 people in 2011, is serving a 21-year sentence in a maximum-security prison outside Oslo. He is not satisfied with the accommodations, though: his three-cell suite with a television and exercise equipment, lodgings commensurate with Norway’s typically humane treatment of its convicts.

Addressing penal officials in a 27-page letter obtained by the Norwegian newspaper Verdens Gang and confirmed by his lawyer, Mr. Breivik bemoaned the “800” strip searches he has undergone, for instance. Not one of them has shown him to be holding an object “between the buttocks,” he noted.

He would enjoy more social interaction, according to the letter, which says he is alone with his thoughts for “23 hours and 55 minutes” on a typical day and speaks only with his guards.

“Such treatment isn’t human,” said a lawyer for Mr. Breivik, Tord Jordet, according to Agence France-Presse.