11
12
by Curtis, Christopher Paul
Published 2006
Published 2006
13
by Pink, Daniel H.
Published 2012
Published 2012
14
15
16
by Fox, Jeffrey J.
Published 2000
Published 2000
17
18
by Lewis, Michael
Published 2011
Published 2011
19
by Rand, Ayn
Published 2007
Published 2007
20
by Hess, Joan
Published 2007
Published 2007