We use the IKEA picture ledges for a lot of the kids books. m.ikea.com/gb/en/catalog/products/art/50152595/ We have several of the small ones, you can fit about 15 picture books on a shelf, I rotate the ones at the front (about 5 on show at a time) so we get a good selection.
I am sorry if this is the wrong place to post it, but i wasn't sure where else would be suitable. Can I please steal some of your ideas for book storage for my DD (17 months). We keep about 10-12 books in the living room, and the rest in her bedroom, which I try to rotate as she gets bored. I tried a storage basket for the living room, but she would only pick a book that was on the top, so they are currently propped against a wall, but it's messy and not ideal. What do you use? I am a bit clueless-I need something that doesn't take too much space but something that would make it easy for her to choose books and put them back where they belong.