Where do you get information on classical music works?

Back in the early days of CDs, each classical CD came with a thick booklet in multiple languages. There was information about the work, the conductor, and the orchestra.

Now, I download most of my music and I don’t get that information. Even if I buy a CD, the notes are minimal.

Sometimes, Wikipedia will have information on a particular work. However, if that fails, I usually look at the Amazon reviews. Often, there is someone who will provide some background information on the work.

Are there any good websites that have information on classical music?