el chelin de plata

el chelin de plata es del autor Ana García García y trata de

As a reward for his good grades, Alfred's father has given him an authentic silver dollar. Over the moon with his gift, Alfred goes to Agatha's house to show her, but his friend has a surprise for him that's bigger still; She's going to introduce him to her neighbour, the writer Sir Arthur Conan Doyle, creator of the Sherlock Holmes novels. Alfred is starstruck by the visit, but the same can't be said  for Morritos Jones, who's angry after a run in with the little dog. The boy goes home upset, but the next morning, with everything back to  normal, it's too late. Morritos has disappeared without a trace.