Scanned course notes are available here. Note that notes from lectures 1, 3-5 will not appear here, for various reasons.
The only textbook listed for this course is a (translation of) Euclid's elements. The 1908 translation by Sir Thomas Heath is now in the public domain, and various editions are available, besides the one available in the bookstore. Other books and materials that may be useful during the term will be listed here.
The slides from the first lecture.