# reference request for construction of expanders

I'm looking for a good exposition of the explicit constructive proof of the existence of expander graph families due to Reingold Vadhan and Wigderson. Arora/Barak has a chapter on it, but i find it to be full of typos, more serious errors, and other annoying choices (not to knock AB -- I like it generally). I just started reading the original RVW paper, but I was wondering if there are other good sources.

9.The zig-zag product 9.1. Introduction 9.2. Construction of an expander family using zig-zag 9.3. Definition and analysis of the zig-zag product 9.4. Entropy analysis 9.5. An application to complexity theory: SL=L