Win these six books in our #1mCR pile up!

As part of today's #1mCR Twitter fun we are giving away a couple of splendid prizes, including this set of six new titles from Laurence King. To be in with a chance of winning them, all you have to do is get your visual-thinking hat and read on...

As we reached 1m followers on Twitter this morning, we thought we would like to say thank you for helping us get there and offer up a great prize for one lucky CR reader.

Publishers Laurence King have kindly dontated six new books for us to giveaway (as displayed above).

They are: Draw Paint Print Like the Great Artists by Marion Deuchars; Fifty Years of Illustration by Lawrence Zeegen and Caroline Roberts; TM by Mark Sinclair; Editorial Design by Cath Caldwell and Yolanda Zappaterra; Post-Photography: The Artist with a Camera by Robert Shore; and 100 Ways to Create a Great Ad by Tim Collins.

As we're celebrating a digital achievement, for this competition we thought we would turn the focus onto our other love: print. So to win this fine selection of paper-based objects, all you have to do is correctly guess the height of the pile when the six books are placed on top of one another*. Old school competition! (*Not end on end! Books will be piled up on top of one another, you know, in a conventional book-piling manner.)

If it helps, page numbers (and dimensions) of each of the books are available on the LK website. But you're a canny lot – and we reckon someone can have a decent go at guessing the combined thickness of all six. If you guess correctly, or if you come closest to the exact figure as verified by our ruler-wielding friends at the publishers – you win the stack.

A few pointers:

– Answers in millimetres, in the comments below, please. Remember to leave your name and also email address along with your guess. If you don't leave an email we won't be able to contact you if your guess is correct.

– Tt would be wise to try and plump for a figure that no-one else has guessed so far, but in the event that the correct answer is left by several commenters, the first to have left the answer wins. (Instagram users will also be playing along and leaving comments on CR's page.)

– The competition closes on Monday October 20th at 11am. Any answers posted after this will not be counted. The correct answer and winner's name will be published on the post later that day.

Good luck!