The top is three pieces all cut with a router and templates.

You need to buy the article to get a full understanding of
what the guy did.

It appears to be very similar to the piece at Target.

Dick Snyder wrote:

Here is a link to what my daughter wants me to build.

http://www.target.com/gp/detail.html...n=B000CCE V92

As you can see the top is a complex curve but I may just build a simple
curve. The top is 12" deep and has to span the book case which is 45" wide.
I couldn't guess from the woodsmith link you sent in your posting what they
did to build the curved top unless it is only a false front edge and the
inside (behind the curved front edge) is really flat.