It's something that we can all do, and it is as enjoyable as it is educational. It also goes to show the importance of books.
Yes, we can all look on the net to find out what someone thinks something is, and how much they think it is worth, but are they right? At least you know that if it is in a book, it's more likely to be right as considerable research and effort will have gone into preparing a book, which costs a lot of money to produce and can't be changed once it has been printed. How many people put such work into their eBay descriptions? Very few, I'd think. Of course, I'm bound to say this, doing what I do, but it really is true. When I used to work for auction houses, books, catalogues and period advertisements were always some of the least valuable lots - the auctioneer always pointed this out to the room, and you know who always bought the stuff? The best and most successful dealers and collectors. I know Summer is nearly upon us and long, dark and cold evenings to curl up on the sofa are over, but why not pack a book along with your picnic for the park? It will undoubtedly make you wiser in the long term than an extra bottle of wine or beer will!