Paperback ‏ : ‎ 122 pages
Reading age ‏ : ‎ 8 - 12 years
Best Sellers Rank: #13,864 in Books (See Top 100 in Books) 
#283 in Children's Comics & Graphic Novels
#355 in Children's Fantasy (Books)
#417 in Children's Action & Adventure
 
Do you like solving mysteries? I do! So when my sister-Thea-heard that there was a secret hidden in Mouse Island's most famous painting the Mona Mousa. I knew we had to crack the code! We began to Investigate and soon as we were following a trail of clues that led us below the streets of the New Mouse City. There we made the most fabulous discovery.