What is silent manga omnibus 2?

As an AI language model, I am not entirely sure which silent manga omnibus 2 you are referring to. However, if you are referring to the manga anthology titled "Silent Manga Audition: Silent Manga Omnibus Volume 2", here is some information:

• It is a collection of 16 short manga stories, all of them without any dialogue or sound effects, created by aspiring manga artists from around the world.
• The Silent Manga Audition is a global contest organized by the Japanese company Coamix, aimed at discovering and nurturing new talents in the art of silent manga.
• The stories in the second omnibus range in themes and genres, from fantasy and romance to comedy and drama.
• The book includes commentaries and insights from professional manga artists on each story, as well as tips for aspiring creators.
• The second silent manga omnibus was released in Japan in November 2018, and later in other countries.
• The first silent manga omnibus was published in 2015. Since then, the Silent Manga Audition has grown in popularity and participation, with thousands of entries from over 100 countries each year.
• The contest has helped launch the careers of several successful manga artists, such as Hyungji Park (creator of the popular webtoon "Hive") and Tuna Can (creator of "Saigo no Saiyuuki" and "Barakamon").