I can strongly recommend the paperback books by Barrington Stoke publishers for all struggling - and relucant - readers.
Published specifically for readerswith dyslexia they are a wonderful mix of age-appropriate content and low reading levels.
They also take account of the visual stress experienced by many struggling readers as they concentrate on text by being printed on off-white non-glare paper - with lots of appropriate illustrations, a limited number of words per page - wide line spacing,slightly larger font than most paperbacks and a ragged right margin.
Struggling readers don't need boring books in childish language - they need the best stories they can get. And that's why Barrington Stoke publish stories by some of the best children's authors in the world.
Do check out their catalogue and find out for yourself.