It isn't essential to do a lot of reading before coming on the course, but these articles may help to prepare you for the approach that will be used.
In any case, please revise any items of anatomy that are not fresh in your memory!
Is Acupuncture CAM?
Where to Place the Needle and for How Long?
Acupuncture, Touch, and the Placebo Response
The Making of Modern Chinese Medicine 1850–1960, by Bridie Andrews
(review of a book with an important section on acupuncture).