Because of an ergonomic issue with my wrist, I wrote out my lecture notes on a whiteboard at home, and then took photos. (The 2020 online version of the course will contain similar content, but the order and coverage of topics may be somewhat different.)
There are a vast number of reviews of the AdS/CFT correspondence, but here are some particularly helpful ones:
• G. Horowitz & J. Polchinski: "Gauge/gravity duality"
• Raman Sundrum: "From Fixed Points to the Fifth Dimension"
• O. Aharony, S.S. Gubser, J. Maldacena, H. Ooguri & Y. Oz:
"Large N Field Theories, String Theory and Gravity"
• Veronika Hubeny: "The AdS/CFT Correspondence"
• Mark Van Raamsdonk: "Lectures on Gravity and Entanglement"
• Daniel Harlow: "TASI Lectures on the Emergence of the Bulk in AdS/CFT"
And here are some of the original papers on the subject:
• Juan Maldacena:
"The Large N Limit of Superconformal Field Theories and Supergravity"
• Edward Witten: "Anti De Sitter Space And Holography"
• S.S. Gubser, I.R. Klebanov & A.M. Polyakov:
"Gauge Theory Correlators from Non-Critical String Theory"