I am interesting in learning about (topological) K-theory. As far as I can see there are 3 main references used:
1) Atiyah's book: This looks to be very readable and requires minimal pre-requesities. However, the big downside is there are no exercises
2) Allan Hatcher's online notes: If his Algebraic Topology book is any guide, this should be an excellent readable account of K-theory. I note that this is unfinished however.
3) Karoubi's Book: A nice looking book - perhaps less readable than Atiyah? (personal opinion, based on a quick scan)
Are there any other references/on-line notes available? I am probably leaning towards an Atiyah/Hatcher combination.
(Can this be made community-wiki?)