Well, all is the title. All the sketches/drawings/inkings of the inktober 2015 ! You can preorder the inktober sketchbook until 30th november here: http://www.xaviercollette.com/shop/fr/home/31-inktober-2015-sketchbook-vol2--9782954938110.html
Love this drawing by MOON • www.mxtr.org, part of the 'Inktober' series
A river like this, dividing a city in half, brings to my mind what one of my cities looks like in Summeria (a city in my book).