The original version of the
site, dating back to July 2000 (it lasted to early 2001, as you can tell from the screenshot above), made use of a black background
with a background image of intersecting ellipses which served to
demarcate the site navigation from the content, as seen in this
screenshot from the Reviews section.
As you can, the content itself was presented, to some
browsers, anyway (at that time basically early Mozilla builds, Netscape 6
and MSIE) in an iframe element. Links to
other articles in the same section (to the left of the content) used
JavaScript to target the iframe. Links to other sections
of the site were above the
content. Each section had a different image in the circle at top left
of the page.
Note the drop cap in the first paragraph of the content — in this version of the site, and in the 2001 version, this was achieved by using graphics of letters. Since 2001, it’s always been handled with CSS.
Users of browsers which didn’t support iframe
got the content in a similar layout, only in the same page as the
navigation — which was certainly more user-friendly, although in a longish page it meant the navigation scrolled away. The look of the
site was rather nice, but the reliance on a frame and JavaScript was
very bad. The same design could be implemented in a much better way
today, using CSS positioning on a div with overflow
set to auto. Such are the advantages of a browser
market where the vast majority of users have a browser with at worst
moderate CSS support. At that time, though, that could not be relied on at all, and users of browsers which could not handle CSS and JavaScript at all well got a separate set of pages with a simpler layout:

first I had a pale blue
background with a green design of lines and circles at the left, a sort
of “molecular” look, with
the name of the section laid on its side and overlaid on the
design, which can be glimpsed in this image from one of the book reviews.
(as the site was making extensive use of CSS now, it did
not take long at all) to the look in the next image, which
lasted well into 2002 with one or two modifications. For users of
browsers with good CSS support, the navigation menu was now fixed
in place when the page scrolled. September 12th 2001 saw the first
entry in the site’s weblog.
the main navigation was in a menu with a graded,
metallic-look background, and a similar gradation was used for the
title strip at the top. The colour-coded pattern to the left
was based, although that is not obvious, on the old “molecular” pattern.
As well as the nav bar, in standards-compliant browsers the title strip
was fixed in place, so all the main navigation was always available to
the user.
The few visible
changes are that the “metallic” box for the nav bar has gone: the main
navigation is now presented simply on the coloured strip to the right
of the content; in good browsers, a double arrow now indicates the
current section in the main navigation; the title strip has gone, with
the logo remaining at the top left and the section title now at the top
right; and the content now extends the full available height of the
browser window.