- Author: Piper John
- Language: Portuguese
- Year: 2014
- Author: Piper John
- Language: Portuguese
- Year: 2014
- Author: Piper John
- Language: English
- Year: 2014
- Author: Piper John
- Language: English
- Year: 2013
- Author: Piper John
- Language: English
- Year: 2010
- Author: Wright Nicholas Thomas, Piper John
- Language: English
- Year: 2009
- Author: Strachan Owen, Piper John, Carson D. A
- Language: English
- Year: 2011
- Author: Piper John
- Language: English
- Year: 2017
- Author: Piper John
- Language: English
- Year: 2013
- Author: Piper John, Taylor Justin
- Language: English
- Year: 2009