I have most of the various books and I think I have the whole archive between them..it was the first comic I read every day when it ran. I had a newspaper route at one point and I loved being able to read the Sunday strip a few days before it 'officially' came out.
I went through some of the books about a year ago and the stuff from the 90s hits really hard today; Watterson foresaw a lot of what we're dealing with now.