There is no satisfactory text for SAXS, so no text is required. Much of the initial material will come from Roe - Methods of X-ray and Neutron Scattering in Polymer Science (on reserve in the EMS library). You should rely mainly on your classnotes, notes handed out, references assigned to be read, and notes posted on the website:

http://www.ems.psu.edu/~ryba/SAXS/saxsmain.html