Basic translation:
"A new book on Touhou Project appears. It continues the work started by Bohemian Archive in Japanese Red, Perfect Memento in Strict Sense and Grimoire of Marisa, and, as always, features new text information, all by ZUN.
It will focus on Gensokyo religious aspects and youkai extermination, with 3 major powers fighting for their points of view! Shinto, buddhism, taoism... are they still disputing!? Will humanity be safe? Can a conclusion be reached? Who is one that started this? The discussion conveyed in 6 chapters will decide the future of Gensokyo! [Went for a more literal approach in the last sentence so I'm less likely to be misunderstood]
At the same time, it will also introduce the characters that appear from Mountain of Faith to Ten Desires. Various sources, such as Gensokyo Chronicle, Bunbunmaru and Kakashi Nenhou newspapers are cited to help the argument." [It's Kakashi Nenhou, right? Kakashi Spirit News or something? I'm not sure]
Can be a bit incorrect, etc etc...