Snakas is reporting on a Transformers Go book which was recently released, though didn't get much coverage on the web.  Below is a direct (incorrect) translation.

I think that there was no notice anywhere, but at the same time Transformers Go! New product launches on the 22nd, new promotional booklet seems to have been distributed. Previously, were distributed from April 27, Transformers Go! visual story BOOK in the second bullet, titled "Sword Ⅱ ~ bot calling on Hen-visual story BOOK". In the booklet of 8 page color as well as last time, says the story BOOK, but there is no expansion of the story concrete, introduction of the combined system and the character is in focus the content of this time. (Cover) 1 page character introduction of two human boy and 6 warrior sword bot: 2-3 pages. Introduction of three union pattern of samurai sword bot team: 4-5 page. Each finishing move introduction of samurai team three major union form: page 6. Page 7: the announcement of the Child magazine is a DVD distribution media, preview of Shinobi team. Introduction Samurai team in toy photo, of all union form of Shinobi team: 8 pages (back cover). Toy photo is being used as back cover, but otherwise, visual animation is used all. Cover over-the-counter and display, image, back cover