SOLVED. Children's book set in UK. A boy wants to be like Sherlock Holmes. Spoiler. [s]

[Katarina]

In this book we follow one boy who wants to a detective . He founds some letters at his home and decide to London alone. At the it turns out that his father lied that his mother is dead , she was living London with her new husband .

[Kris]

Katarina, around what year did you read this book?

What did the letters contain? Early in the book, who appears to have written the letters - and who were they addressed to?

Story's time period?
Does the boy live close to London? How does he travel to London?
Is the boy a fan of Sherlock Holmes?

[Katarina]

I read this book ten years ago and it's set in 2000s.The boy doesn't live close to London and he is big fan of Sherlock Holms .I think he that letters are for him and that his mother written and because he doesn't have money he is going to London by train

[Genesistrine]

The Curious Incident of the Dog in the Night-Time by Mark Haddon?

[Katarina]

Yes that's it thank you Genesistrine