Who's Afraid of Beowulf? by Tom Holt
Who's Afraid of Beowulf? Well, not Hrolf Earthstar, for a start. The last Norse king of Caithness, Hrolf and his twelwe champions are woken from a centuries-long sleep when Hildy Fredriksenn, archaeologist of the fairer sex, finds their grave. Not only that, Hrolf decides to carry on his ancient war against the Sorcerer-King.
In a mixture of P.G. Wodehouse, Norse mythollogy and Laurel and Hardy, Hildy and her Viking companions face such perils as BBC film crews, second-rate fish and chips and the Bakerloo Line in their battle agaainst the powers of darkness.