<p>USA TODAY BESTSELLER</p><p>When an apprentice from the Mapmakers&#39; Guild goes missing, Matt and India are employed to find him. Going undercover as a married couple, they discover that not everyone at the guild is what they seem, and the lad&#39;s unearthly maps caused jealousy, suspicion and fear.</p><p>With one of the apprentice&#39;s magic maps in their possession, India and Matt must use their wits and India&#39;s fledgling, untried magic to find him. But the more they investigate, the more sinister plots they uncover, including a link between the Mapmakers&#39; and Watchmakers&#39; Guilds, and an ancient magical treasure buried beneath the streets of London.&nbsp;</p><p>As the net of suspicion widens and enemies draw closer, it&#39;s not just the apprentice&#39;s life that&#39;s in danger, but Matt&#39;s too. Someone will go to great lengths to prevent him discovering the name of the man who can fix the watch keeping him alive. Great lengths indeed.</p>