According to post on official Twitter account, Ayatsuji Yukito revealed that he plans to write a spin-off and a sequel novel of his horror mystery novel Another .

Tentative title “Another ~ episode of S”, the The spin-off novel will feature the past story of Mei and her cousin Fujioka Misaki while the sequel novel will be tentatively titled “Another 2”. No detail yet on the story.

Last year, an OVA adaptation of the anime series was announced to release this May and it will be bundled with the 0th limited-edition volume of Another manga novel.

Sources [1] [2]