these are my books:
  • Veganismus (published in 2014), a book in German about veganism, what it is, its history, why vegan, how vegan, and some ideas on how to promote veganism
For more info see here.

  • Nutrición vegana – separando la evidencia de la creencia (published in 2017), in Spanish. An Italian translation (Nutrizione vegana: Separando l’evidenza dalla credenza) is also available (also published in 2017). 

For more info see here.

  • Vegan Baby: Vegane Beikost für das Alter 4 bis 12 Monate (published in 2020), a booklet in German about complementary feeding, i.e. introducing solid foods in addition to breastmilk to a vegan baby's diet

For more info see here.

And the English version: 
Vegan baby. A guide to complementary feeding. For vegans between the ages of 4 and 12 months (published 2020)