Now for the first time in one big volume, two novels of Dr. Johan Eschbach, professor at a small college in the northeast and secret agent for the government of Columbia. This is an alternate history world shaped by the fact that ghosts are not mere superstition but have a literal physical reality--and political implications--because your crimes can haunt you, and the ghosts of your crimes are visible to others.Here are two adventures-- Of Tangible Ghosts and Ghost of the Revelator-- that bring Johan Eschbach out of his retirement and happy marriage in northern New Bruges and into danger and intrigue. This edition includes a new afterword by the author explaining the history of this fascinating alternate world.