The awesome part is these are all real books Gaunt has read no headcanon here.
[ Gaunt nods and ventures a faint smile. ] I do, actually, however, I hardly think the epistles of Saint Sabbat are properly cheerful pieces. They describe her life and martyrdom, and are both prophesy and poetry at once. They do a very fine job of describing battle with metaphors, though, and some of the language is almost coded, such as referring to battle as the flower incarnadine.
Hm... There is some poetry as well in Ravenor's Spheres of Longing. However, that book is primarily a philosophical text, and is a bit dry for the audience you are intending to entertain.