When I use to keep a journal, when my treatment started, I started on the last empty page and went backwards to the begining, I'd then look back at "where" I was back then, feeling good, seeing I had progressed.
If reading for some is prefered by going from the end to the begining, I guess all that matters is that a person reads.
If it's the Bible, and one finds that style of reading, it may be different or difficult, but if it brings comfort and/or enjoyment that's cool.