The charts are if you want to put the "picture" on the sock. You can do so either while knitting in or you can use duplicate stitch after, or do like me, and ignore the "decoration" all together and just make the socks
I won't make socks any other way now! After you get the basics, you can very easily translate any pattern written for dpns to 2circs..
So don't let charts in that book even phase you. They are not charts in the normal sense of stitch pattern.