By way of the Bookseller, the Guardian reports that Pearson boss Marjorie Scardino has fallen four places in the Guardian’s “Media 100″, the newspaper’s power-list of the media world’s movers and shakers. She is the only book publisher in the list, Reed‘s Crispin Davis having dropped out in 2004. Placed at 41, Scardino is one below Guardian editor Alan Rusbridger, but 17 places below the Doctor Who actor David Tennant. Social networking website Facebook comes in at 100. Google chief executive Eric Schmidt – a new entry – is top of this year’s MediaGuardian 100 list.