A Discovery Disappears written by Pip Murphy, illustrated by Roberta Tedeschi, narrated by Vanessa Labrie, published by Sweet Cherry Publishing.
“Whoever gave you that sandwich did it deliberately. They wanted to sabotage Fleming’s research.”
When Agatha accidentally eats a major scientific discovery (hidden in a sandwich!), it’s a race against time for twins Agatha and Christie to find out who’s trying to ruin physician Sir Alexander Fleming’s reputation.