Someone is stealing the druids of Britain; a savage murderer stalks the streets of London; and the magical barrier of Bran's Wall no longer suffices to keep unholy forces away from British shores. Friesner's ( Elf Defense) version of Victorian England provides the setting for a fantasy-detective story featuring an engagingly familiar pair of sleuths, a time-traveling druid named Wells, and a queen who rules by virtue of the magic in her blood.