The Emperor's Code

Floors

The Tenth City

Skeleton Creek

Thirteen Days to Midnight

The Dark Unwinding

Secret of the Forbidden City

Blood Line

The 39 Clues

The Black Circle is the fifth installment in the 39 Clues series, where siblings Amy and Dan Cahill continue their worldwide quest to discover the secrets of their family's power. This time, they find themselves in Russia, where they must outsmart their rivals and navigate the dangerous underworld of the Russian black market.

Perseverance

Courage

Identity

Problem-Solving

Family And Relationships

National Pride

The Black Circle

Discover Your Child's Next Read

The Emperor's Code

Gordon Korman, Gordon Korman (Author), 2010

Floors

Patrick Carman, Chris Turnham, 2011

The Tenth City

Patrick Carman, 2006

Skeleton Creek

Patrick Carman, 2009

Thirteen Days to Midnight

Patrick Carman, 2010

The Dark Unwinding

Sharon Cameron, 2012

Secret of the Forbidden City

James Patterson, 2015

Blood Line

Kate Cary, Paul Heatley, 2007