“Three Advanced Lectures on Inflation”. Lecture notes of lectures first delivered at the “Nordita Winter School 2024 – Particle Physics and Cosmology”, Stockholm, 15-26 January 2024, now written up in LaTex and available on arXiv: https://arxiv.org/abs/2606.06581. My original handwritten notes can be found here https://indico.fysik.su.se/event/8276/page/626-reading-material.