We greatly appreciate the monetary contributions made by Lush Charity Pot, Cruelty Free International, Lush Prize, The American Fund for Alternatives to Animal Research, Ärztinnen und Ärzte für Tierschutz in der Medizin, Safer Medicines Trust, and a private donor, who have enabled us to make this book freely available online. We are also grateful for the input and suggestions made by anonymous peer reviewers.