The Sinister Booksellers of Bath

When Merlin meddles with an ancient map, he is pulled into a magical, liminal garden that is full of anachronistic people and, even more terrifyingly, modern-looking corpses. Susan is called in to rescue him using the powers she discovered on their last adventure, and the two set on the trail of discovering who created the map - and who killed those people... The sequel to 'The Left-Handed Booksellers of London'.