I am looking for a good introductory book for Seiberg-Witten theory. The only textbook I have now is Morgan's "The Seiberg-Witten Equations and Applications to the Topology of Smooth Four-Manifolds". This book is self-contained and concise and definitely a good book, but I am lost before section 4 "Seiberg-Witten moduli spaces" due to my poor background.
I would appreciate it if you could introduce me a good textbook or introduction paper for this subject. I am also happy if anyone knows a good reference for spin bundles and Clifford bundles. I am aware of the book "Spin Geometry" by the way.