Explore the intricacies of entanglement island computations in this comprehensive tutorial presented by Raghu Mahajan, a member of the School of Natural Sciences at the Institute for Advanced Study. Delve into key concepts such as quantum extremal surfaces, two-dimensional conformal field theory, and entanglement in transparent boundary conditions. Examine nonlocal effects and long local effects in entanglement, and discover generalizations to nonzero temperatures and time-dependent scenarios. Gain insights into the linear growth of entanglement islands and their significance in high-energy theory. This seminar, part of the IAS High Energy Theory series, offers a deep dive into advanced quantum physics concepts for researchers and enthusiasts in the field.