Children's book storage

I'm starting to feel like the children's books are taking over my home and not in a good way. Instead they are slipping across floors, peeking out from under the sofas, in toppling stacks or heaped unceremoniously into plastic tubs where it's a scrabble to find a desired book. I would much rather they had neat, tidy storage ala the library's lovely wooden pods where oversized books are easy to pluck out. So I've been on the hunt and narrowed my choices down to these:

This is a very simple solution. Big enough to hold 40 books of differing sizes, easy to access and not overly large. I prefer the white but it also comes in natural wood and petrol blue. I feel this one wins out on size and though it's the pricier of the two, I think it's something that won't date or look too young as my children get older. £69 at Tidy Box.

I've seen this kind of sling bookcase used in classrooms, nurseries and similar buildings and they are again simple and easy to access. the downside is with it being taller, you really need some spare wallspace. £45 at Great Little Trading Co.

What solutions have you found for your books?