Les inseparables, Genus Agapornis (2018)
- First edition 2018 – French edition
Antología del Agapornis (2018)
- First edition 2018 – Spanish edition
Lovebirds Compendium (2016)
- First edition 2016 – English edition
Erfelijkheid bij vogels (2014)
- First edition 2014
Agaporniden, handboek en naslagwerk Part II (2013)
- Revised Edition 2012 – 2013
Agaporniden, handboek en naslagwerk Part I (2012)
- Revised Edition 2012 – 2013
Agaporniden, handboek en naslagwerk (2005)
Translations:
- Love birds, Owner’s manual and reference guide – English edition September 2005
- Agapornis – Spanish edition 2006 (updated edition)
- Agapornisivé – Czech edition 2006 (updated edition)
- Agapornis – Italian edition 2009 (updated edition)
- Agaporniden: (part 1) Arten, halting, Ernächrung, Zucht – German Edition August 2010 (updated edition)
- Agaporniden: (part 2) Mutationen, Farbschläge, Austellungen – German Edition November 2010 (updated edition)
- Agapornis – Spanish edition 2016 – second edition
De roseicollis en zijn mutaties (2002)
- First edition 2002
- Second (updated) edition 2007
Kweken met agaporniden (2001)
- First edition 2001
- Second edition 2001
- Third (updated) edition 2002
- Fourth edition 2007
Agaporniden (2001)
- First edition 2001
- Second edition 2001
- Third (updated) edition 2002
- Fourth edition 2004
- Fifth edition 2005
- Sixth edition 2007
- Seventh (updated) edition 2008
- Eight edition 2010
- Ninth editon: 2013
Translations:
- The Love bird – English edition September 2003
- Love birds – Greek edition 2006
- Agapornis – Spanish edition 2006
- Love birds –Australian edition 2006
