towards the centre. The simplest way to fill one in is to start at an outer end of the spiral (it doesn’t matter which) and just colour towards the middle. Pause there to see if you can discern what the image is, then work out along the other spiral to the edge again, hopefully to reveal it in its full glory. For different effects, colour the two spirals with different shades, or divide the spiroglyphic into sections, colouring each differently. It’s easiest to colour all of one number at a time, starting with the areas numbered “1”. Perhaps experiment with using different grades of cross-hatching, paint and other media to achieve different effects. You might want to make some copies before you begin! It doesn’t matter what you use to colour in the overlapping circles in a querkle. Just make sure you have five distinguishable colours, and that you shade areas numbered “1” the darkest, and those numbered “5” the lightest. Leave any areas without a number blank.

Spiroglyphics is even more incredible than anything Thomas has done before. Each oversized design starts its life as a featureless spiral, but as you fill in the lines you find yourself creating a surprising, eye-popping portrait of a wonderful animal. Fun to create and amazing to look at, Spiroglyphics will blow your mind, and make amazing artworks for your wall!

Start in the middle of your image, working out in a spiral. Surely that part is easy. The equation of a spiral in polar form is just r = k*theta. The tangent line to such a spiral is almost as easy to compute. Spiroglyphicsfeatures a new type of mind-bending graphic puzzle from Thomas Pavitte, best-selling author of the 1000 Dot-to-Dot and Querkles series. At first, all you see are simple spirals. But when you look a little closer and start to color between the lines, you'll see a scene begin to take shape—and when you're finished, you'll have a masterpiece worthy of being framed on your wall.