The place I work at (Khalifa University) hosted a presentation by Rob Hill, a leading author at Black Cat Publishers.
The presentation was a very 'live' version of the advice Rob gives in his useful "The Black Cat Guide to Graded Readers" available on the Black Cat Website
I am very impressed by the Black Cat catalogue of graded readers. When you look at the Black Cat website you will find a range of titles which you can preview. All of the titles that I checked included "dossier" pages which provide factual contextual background on the stories which range from Shakespeare and traditional fairy tales to modern high-tech thrillers. Young boys in particular like to read non-fiction, and so adding factual information that contextualises the stories should help to keep their interest. The Teacher's Corner also includes lots of extra material to help introduce readers into the classroom.