Professor Plumbum's Pencil - Mummy-Alert! (vol. 1)

In the building where Hanna and Henry live, Professor Plumbum has a stationery shop in which he sells pens, notebooks and sweets. But Professor Plumbum’s got also a magic pencil: hoever
writes with it travels to different worlds! Whether into the past, under the water, or to the moon – in every book, the two friends and their cat are swept up in a new and exciting adventure!