Writing on Createspace and Lulu. Reading on the sofa

I'm considering republishing some of my childrens' Bible stories on Createspace so they'll be available on Amazon. I'm still not sure how it will work, but it's going well so far. The cover creator's not as nice or as flexible as Lulu's, and they won't write on the spine if you've got less than 135 pages, which is a bit of a shame. There's lots of information about distribution that I've not read yet--will I ever get these books in bookstores or libraries? I'm hoping maybe an ISBN will at lea...