The Old Testament and New Testament Overview series that covers all 66 books provide an outstanding overview of the literary structure of each book, a big help in seeing the threads of common themes, and a great picture of The Lord's redemptive plan through Jesus woven through each book.
Recently, I had the thought that it would be cool to read through the entire bible in a day. With the idea that if someone were able to accomplish such a thing, potentially, much of the detail would be fresh in the mind and allow the reader to connect the scriptures and also connect _to_ the scriptures in a unique way. In climbing, a big challenge is to try to tackle objectives that would normally take multiple days to climb, in a single day. There are popular ones like NIAD, HIAD, or RIAD (Nose in a day (of El Capitan), Half Dome in a day, Rainier in a day). Not only does moving fast reduce exposure to weather hazards, but you get to experience the grandeur of its particular path and it's setting amid creation over the course of a short, memorable time, and most of all, it tests a person's grit - their fitness both physical and mental, and whether or not their preparation was enough. I don't expect to be able to ever read through the entire Bible in a day, but interestingly, a run through the Bible Project Overview Series may allow a 'mere mortal' to take a rendition of this trip through the scriptures in an achievable manner -- connecting the testaments, seeing the themes, hearing the overarching messages, and perhaps something else entirely too. The adventure awaits. I question whether someone, having gone and done it, would come back and say, "Nah, I did it, and I didn't gain anything from it."
Here are the collective times of the videos series:
Old Testament Overview Series: 5 hr, 12 min, 19 sec of video
New Testament Overview Series: 4 hr, 33 min, 49 sec
Total: 9 hr, 46 min, 8 sec