peepeepoopoo

iii) The complete guide to isometric pixel art.
Probably the easiest to start off with, which introduces how to draw 3d shapes then puts them in an environment. Still, this is only isometric pixel art


iv) Learning pixel art ($1)
Not sure about it since I still haven't bought it, but looking at the price it seems worth it.
v) Pixel Logic ($9)
Seems like a really interesting book, still it is under completion.

I do have a few additions when it comes to books. Though be warned if you want to get the books for free, there are shady websites that do so. Though they are safe, I would recommend buying the books below in amazon/google books. I won't put the links here as i'm sure it's better to support those wrote the books, and to not have your information be potentially be stolen by other people

i) Pixel art for game developers ($40)
Maybe a bit too early as a starting point, since the first thing you do is to draw a person. Admittedly. $40 as a price point is too expensive for me.

ii)Design Arcade Computer Game Graphics (Free)
Around half of it is about gamedev and the other half on pixel art.

thanks!