Is it really necessary to read it cover to cover? A lot of it seems quite drawn out, and there seems to be a lot of overlap, particularly between the four gospels of the New Testament (Matthew, Mark, Luke and John).
It depends on what you want to get out of it. My reading is a philological/historical one, I'm aiming to become a scholar of literature (I'm a humanities student with a passion for computing), and also I'm looking for literary prompts in it, so a deeper understanding is important for me. But if you just want to know what it's about, then you can peruse the book and rely on commentaries and recaps. But all in all it's about 2000 pages, which equals to 4-5 novels, and does not require a linear, uninterrupted reading, so I guess it's worth it. I'm still reading the old testament (1Sa), but AFAIK the gospels do overlap in the story but views and interpretations are different.
Those 4 gospels offer varying perspectives and are worth reading as well. They each offer something different and can be helpful when studying. For example, Luke's account offers insight as to what was going on during the time of Christ's birth(see Chapter 2, the decree from Caesar Augustus) while Matthew starts off with the genealogy of Christ. So I believe that reading cover to cover is worth it.