В начале было Слово, и Слово было у Бога, и Слово было Бог...
(Seriously, the Gospel of John is a GREAT text for new learners of any language...in part because it was written by someone who was using their second language. St. John keeps his vocabulary and sentence structure very beginner-friendly, and I suspect people will get a pleasant surprise at how much they can read of it after finishing this tree.)
Indeed, that also offers good reading/translation material. I think the person who set Genesis to writing (think that was Moses?) may command a greater vocabulary and grammar than St. John since he was presumably writing in a language that he was actually a native speaker of, so it is probably more advanced material than the Gospel of St. John, but the earlier parts of Genesis detailing the Creation and Fall are so well known that they could indeed be very useful to a language learner. :-)