Since the novel's translation hasn't been updated for quite some time, it may have been canceled.
A novelization of Anohana: The Flower We Saw That Day (あの日見た花の名前を僕達はまだ知らない。 Ano Hi Mita Hana no Namae o Bokutachi wa Mada Shiranai. , lit. "We Still Don't Know the Name of the Flower We Saw That Day.") by Mari Okada was serialized in Media Factory's Da Vinci magazine from March to July 2011.
The young girl appeared at the end of summer. They had been very close childhood friends, regardless of time. However, as they became high school students, the distance between them gradually increased, setting them apart. Jintan became a shut-in. Anaru endeavored to meet the expectations of her female friends. Yukiatsu and Tsuruko entered an elite high school. Poppo gave up studying and traveled around the world. Finally, the only one unchanged, a girl called Menma, suddenly appeared in front of Jintan, hoping he could help grant her wish. With this turning point, the six of them gathered once again…
Anohana: The Flower We Saw That Day Part 1 - あの日見た花の名前を僕達はまだ知らない。（上） (MF文庫ダ・ヴィンチ)