Mastering Microsoft Paint: Pat Hines, who wanted to use Photoshop to illustrate his e-book, could not do much with the complex software which it is. He dropped the plans to learn it any further and using the good old’ Microsoft Paint, he created artistic gems. Pat Hines sucks to learn Photoshop and then spent the subsequent 10 years learning Microsoft Paint. He had been working in Microsoft Paint for 10 years tried Photoshop/other programs and decided to stick with his comfort zone. Visit his Deviantart page where he documents how he makes similar art in step-by-step pics. (h/t: boredpanda)
You can also find out more about his book and purchase it on Amazon.