The Mummy's Demon Realm

The Mummy's Demon Realm summary: One summer Hino is hired by Tairiku Shobo to create a manga about mummies as part of their \"Tairiku Shobo Mystery Series.\" Drawn in by the interesting subject matter he accepts the offer without hesitation, but he soon realizes that he knows nothing about mummies. So before going to bed, he starts to read a reference book that the editor had left. As he delves deeply into the book the atmosphere in the room changes and with a knock at the door, the mystery begins... Published as volume 4 in the Tairiku Shobo Mystery Series