℃-ute Last Official Book (℃-ute ラストオフィシャルブック) is the last book by ℃-ute and a compilation of the group's past 12 years before their disbandment. It was published on May 1, 2017 by Wani Books. A limited edition including a making DVD was released only through the Wani Books Special Edition site and the Hello! Project Official Shop.
The book includes their last gravure shoots, their last "selfish" solo projects, their last one-night-and-two-day graduation trip together, last close coverage (from Hello! Project concerts, ℃-ute Day, fall tour, and MV filming), two-member conversations (10 in total), their last solo interviews, and a final round-table discussion between the five members.