Oh my. What a decision. First would be my 501 blocks book and then I bought more similar to it. I would think any of my wondrful books is a treasure. And read each from cover to cover so you know what's in each book. I keep all my magazines in binder in date order and have a list at the front of special articles and such. I can find a book and date when someone needs it. AndI can sit and read any time I need some time out for myself. Fun to see what everyone else's replies are.