Billet of the research book “The world of jinns” (djinns.hypotheses.org), programme of the colloquium Islamic occultism in theory and practice. From 6 to 8 January 2017, a colloquium takes place in Headley Lecture Theatre at Oxford University “Islamic occultism in theory and practice”. It is organised by Liana Saif (University of Louvain/University of Oxford), Matthew Melvin-Koushki (South Carolina University), Francesca Leoni (Ashmolean Museum, University of Oxford) and Farouk Yahya (Ashmolean Museum, University of Oxford). He is sponsored by Oxford University, Ashmolean Museum and The Barakat Trust.