by encyclopedia I mean a timeline of albums
...I withdraw my question *eats a chocolate bar*
It can be useful as an information resource though, giving you a starting point from which to explore. If you are looking for a website which only discusses music you like, it does not exist.
I'll admit their album ratings are usually spot on.
Obv if you want something more detailed then there is Rate Your Music or Discogs.
I admire you for having the courage to ask such a question on this forum. What do you think this is, a music website?
RYM provides more of a consensus view in terms of ratings, but like any website built on user content it can vary in quality. Allmusic is more straightforward in terms of content and presentation, but provides a more 'professional' information resource as a starting point.
and doesn't review or even acknowledge the existence of a lot of music that I like
http://rateyourmusic.com is a great way to see discogs at a glance, read varying views on albums and (through the lists) find similar albums. Do most of my musical discovery on there...
It contains excerpts from his book, so you aren't getting the whole picture. I am not fond of his writing style, as it generally takes of the form of blandly dissecting each major musical genre.
aka, the Metal Archives.
if you like metal, you will already know this though. it is encyclopedic!