I have bought 91 books from different sources, Simon % Schuster, Barnes.... that I was reading on an iPad ( I know, I know

) before deciding to buy my first reader, a Kobo H2O that makes me wonder why I have waited so long.
I have tried everything possible (for me) after researching the web to get my books which are all DRM protected of course on my new reader but no success. Is this possible or have I spent a good amount of money on books stuck on an iPad?
Thanks