People of all ages may struggle with decoding letters and numbers on the written page, and there can be many reasons for this difficulty, including: dyslexia, dysgraphia, dyscalculia, Attention Deficit Disorder, and Selective Mutism.
Alternate/accessible formats for reading
Libby - an easy-to-use app to access ebooks and audiobooks, for library cardholders. Check out the Accessibility features.
Librivox: public domain audiobooks; no account required to download; fun to volunteer