Martha the Mathemagician and the Secret Code

Martha the Mathemagician lives on Calculation Island (where numbers grow on trees) with her life-long best friend Oscar the Owl and her Grandfather Max, who is an old and wise mathemagician. In this first book of the series, Martha is given her magic calculator and has to discover the secret code that will unlock its powers.

Martha Matematicianul locuieste pe Insula Calculului (unde numarul creste pe copaci) impreuna cu cel mai bun prieten al ei de o viata, Oscar Bufnita si cu bunicul ei Max, care este un matematician batran si intelept. In aceasta prima carte a seriei, Marthei i se ofera calculatorul magic si trebuie sa descopere codul secret care ii va debloca puterile.