These are estimate of the sales on comic books by Diamond U.S. to comic specialty stores during January 2018.

These are estimates of the sales on graphic novels by Diamond U.S. to comic specialty stores during January 2018.

A manga produced in Japan based on an American intellectual property was the top manga in the U.S. book channel according to information provided by NPD BookScan.

The first volume of RWBY sold nearly twice as many copies as the #2 manga in the U.S. book channel in January, according to information provided by NPD BookScan.

This week’s home entertainment releases include Takashi Miike’s blood-soaked adaptation of Hiroaki Samura’s innovative Blood of the Immortal manga, the most successful family drama of 2017, two animated features inspired by the 1960s Batman TV series, plus the Filmation Superman and Batman shows from the 1960s and 1970s, every episode of Doctor Who featuring the 12th Doctor, as well as the first season of the gritty HBO period drama The Deuce .

While the percentage change abated, the full picture was significantly worse, as January 2018 was a five-week month vs. a four-week month a year ago.

The latest Saga volume was the #1 adult graphic novel in January 2018, based on NPD BookScan data provided to ICv2.

This reporting on the actual sales reported by NPD BookScan on the Top 20 Adult Graphic Novels helps see the relative sales on the bestsellers, and is also instructive when compared to the sales for other graphic novel subcategories in the book channel, or to sales in the comic store channel.

This week's home entertainment offerings are anemic, but there are some items of interest this week, especially the fire-fighting drama Only the Brave , and there are some interesting TV offerings including the latest season of Homeland , a "mostly complete" Ren & Stimpy set, and The Complete Duckman.

VIZ Media published all 20 of the Top 20 Manga in the book channel for the full year 2017.