
The power of two
2007
ISBN 9780439240703
Seeing is deceiving
2001
ISBN 9780439240727
Kindred spirits
2003
ISBN 9780439472197
Don't think twice
2002
ISBN 9780439240741
Dead wrong
2002
ISBN 9780439240734
Split decision
2003
ISBN 9780439492300
The witch hunters
2003
ISBN 9780439492270
Destiny's twins
2004
ISBN 9780439492324
Building a mystery
2007
ISBN 9780439240710
Double Jeopardy
2002
ISBN 9780439240758