Fact or Fiction? Ed Power pits Ian McEwan's 'The Children Act' against Karl Whitney's 'Hidden City: Adventures and Explorations in Dublin'

Oh, how the capital has cried out for a book like this: a metaphysical travelogue that delves into the hidden history of Dublin and breathes deep of its psychosphere,  much as the writer Iain Sinclair has in writings about the eerie fringes of London.