If you're not despairing of what a child is reading you're probably not doing things properly...
I really struggled with reading/writing - had remedial classes with the special teacher in primary school and then once the penny dropped, my reading age was off the charts (actually!) by the last two years of primary...
Everything with words, I read - from Enid Blyton to Dick Francis, Nevil Shute, Agatha Christie - all the dire drippy Pony Books from the Pullein-Thompson sisters, Monica Dickens, Ruby Ferguson, Patricia Leitch..
Mother hated it, but kept that hatred to a low simmer really, and kept the book supply coming (I did have to buy the pony books with my own money from charity shops though, she drew the line there).
These days... I am a writer, and on my kindle right now are several fantasy novels, a recently republished Patricia Leitch from the Jinny series of pony books and Irving Finkels - The First Ghosts.