Books or Website References for Training?

Hi,

I've unfortunately let my HTML skills rust terribly.  Once I worked at
getting my pages to validate HTML 4.01, I let things slide.  Now I'm getting
ready to dig in again, but find the changes almost too much tackle.  I see
questions posted and admit that I know nothing about most of the topics
being discussed now.  Can anyone suggest a good web site (tutorial, etc.)
for learning where to go after 4.0?  I never even learned Cascading Style
Sheets (CSS) . . . just validated with 4.01 transitional.  I now have a
stack of older (expensive) HTML books and hesitate to purchase more without
knowing what I need to concentrate on first.

Thanks in advance . . . all suggestions will be very appreciated!

Caryl

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