To the person claiming the author stole the letters
You claim the woman wrote them to her then 3 year old, who was 11 at the time you posted so likely now 12. Which means they were written at most 9 years ago. The book was published 11 years ago. Did the author travel to the future to steal these letters? Because Your math ain’t mathing. Nice try though.
Fantastic book - my kids love it!