Chapter Book Challenge, Chapter Book Challenge From Harper Review of “Thea Stilton and the lost letters”, written by Thea Stilton Written by Summer Student on July 25th, 2015. Leave a comment Reviewed by: Arabella Review: This story takes place in Russia. My favorite characters we Aleksandra, Colette and Nicky. This book was so good I just could not put it down. I cant tell you much but you have to read it. Overall Rating: 4 Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on LinkedIn (Opens in new window)