Kevin Hurst has kindly been through the one-stop starter repertoire booklet and found a few errors, mostly small but one was absolutely colossal.
Oh, the colossal error? I left out some vital moves in a line of the French Advance:
1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6
6.Be2 cxd4 7.cxd4 Nh6 (these moves were omitted)
When the Black Knight comes to h6, White might want to take it.
The Knight will be strong when it comes to f5, and the White Bishop on c1 is always going to be blocked in by the White Pawns. So why not take it? White will get a surprise!
8. Bxh6 Qxb2! T
Black is winning.
This is rather important to get right, as if instead
6.Be2 Nh6!? 7.Bxh6! Qxb2? 8.Be3! Qxa1 9.Qc2, and the Black Queen may be trapped, and if not White should get a big attack.