They are the brainchild of Nick Dolan (interview here), a geologist from Las Vegas who goes by his artist moniker 'Vegenaut'- when he's not busy mining in the Mojave desert! He started creating these hyper-detailed doodles 14 years ago and now has two unique and distinctive books to show for it. Take a look inside the kaleidoscopic world of Vege below!
The illustrations are all one-sided in both books (30 designs in Vegebook, 65 in Vegepatterns) and the paper is smooth with an average thickness. As you can see in the previews, Nick's linework is generally quite thick but retains the small spaces, and the patterns vary from statuesque faces to quilts and snowflakes. Everything has an 'alien' feel to its structure, almost cell-like. They're certainly a unique type of colouring art that you'd be hard pressed to find anywhere else.
Here are my finished pages from the books! Note how I chose fairly easy ones to suit my laziness :P I did them with Stabilo pens and Promarkers.