Dan and the Caverns of Bone - Thomas Taylor - Bog

Dan can see ghosts. See then, speak to them, and sometimes help them...for a price. In his second adventure, Dan is on a school trip to France when he gets mixed up in skulduggery down in the Paris catacombs. Can Dan save the living, help the unquiet dead, avoid getting himself killed - and do it all under the eye of an enraged French teacher? Brilliantly dark humour.