TITLE: Gentle introduction to fibre bundles and gauge connections
QUESTION [9 upvotes]: To better understand papers like this for example, which makes heavy use of fibre bundles and gauge connections to represent gauge fields, I am looking for a nice introduction to this topic.
The only thing I have read so far is the corresponding chapter 15 of Roger Penrose's "Road to Reality".
I do not want to read a whole book, I am rather thinking about an appropriate introductory paper, lecture notes, or a tutorial.

REPLY [2 votes]: I do not know what are gauge connections. However for connections on bundles, a "lecture note" reference is J.-L. Koszul's Lectures on Fibre Bundles and Differential Geometry.