Hello I am confused about which Haynes manual to buy,

1) 1996 - Feb 2000, M - V reg

2) 2001 - 2004, X - 54 reg

Now my car is an X-reg Registered in Sep 2000 115bhp. I thought it was a facelifted B5 model but it seems to fall "in-between" these two Haynes manuals. Is it just the case that Haynes never updated their manual to reflect the fact that further B5s were produced after Feb 2000?

Thanks.