There was a fly in soup when I went on line to shop for a good manual for MY camera, in this case, the recently new to me D800. I love this camera, because I own several old film lenses, full frame manual kind, ones. I took a look on line to see what is available for my D800 ( 270,014 shutter counts) but is working great eh and it was frugal purchase.... When on line I saw user books for D800/D810 and that where it irks me to no end, they all cover the D800 and D810 simultaniusly. I am a stickler for specific camera not its almost the same bretheren or is it sisteren eh! No matter how identical they are, they are not the same. The latter, D810 being even better I am told. Well so be it, mine is D800 and I stick to it. It deserves a separate user book titles as such eh. It reminds me of youtube uploads on camera tutorials where the poster has a wonderfull presentation on camera use but is using the camera that I dont have. He keeps on saying it the slightly different procedure if you have a Nikon while he is using Canon.....Anyway that was my rant eh and now I am back to my corner and watching snow come down, again! To you all, have great stayin eh!