This is the 4540th most frequent German word.
publik
"Publik" means "public" in English.
In this sentence, 'publik' is used as an adjective describing that the book was released or made known to the public.
Das Buch wurde erst kürzlich der breiten Öffentlichkeit publik gemacht.
The book was recently made public to the broad audience.
Here, 'publik' describes that the information was shared or became accessible to the general public.
Nach ihrer Entdeckung wurde die Information bald publik.
After its discovery, the information soon became public.
In this example, 'publik' refers to private matters being exposed to the public.