From her blog:
Houdini & Holmes
written and drawn by Polly Guo
25 pages, 50 copies (I'll order more if there are more people that want it, but it might take longer)
$4.00 USD + shipping
* Shipping is $2.00 to the US and $4.90 to ship anywhere else
* For $1 more I'll include a sketch with your order!