The Leiden Overview on SOGIESC in International Law (put together by Kees Waaldijk & Waruguru Gaitho) is a list of online introductory video/audio/reading materials for anyone interested in the international legal aspects of SOGIESC (= Sexual Orientation, Gender Identity/Expression, Sex Characteristics) – and in particular for anyone (considering) taking part in Leiden University’s Summer School on Sexual Orientation and Gender Identity in International Law.