nicklaf

there is a link to this gem [2], which, for example, has a chapter [3] on what appears to be a very interesting generalization [4] of the "master theorem" of CLRS.

[1] http://opendatastructures.org/

Of course, for an even deeper treatment of asymptotic analysis check out Flajolet and Sedgewick [6]!

Another good resource that pages links to seems to be [5], which was recently mentioned on HN.