The European Summer School on Artificial Intelligence (ESSAI) is the premier school on Artificial Intelligence in Europe. It is organized every year by the European Association for Artificial Intelligence (EurAI) together with the Advanced Course on Artificial Intelligence (ACAI). ESSAI & ACAI 2024 will take place in Athens, Greece for two weeks (July 15 to July 26, 2024). It will be organized by the Artificial Intelligence Team of the Dept. of Informatics and Telecommunications of the National and Kapodistrian University of Athens, in collaboration with the Hellenic Artificial Intelligence Society. ESSAI 2024 will offer many courses covering all areas of Artificial Intelligence and being taught by top experts in the field. Every course will consist of 5 lectures of 90 minutes each spread over one week. The courses will be solicited through an open call for proposals and will be selected by an international program committee. ACAI 2024 will offer invited tutorials (of 2x90min each) on a topic to be announced.