The first trade paperback collecting Top Cow’s Rebirth storyline, Witchblade: Rebirth Vol. 1, will street in June.  This $9.99 144-page volume collects the first Witchblade Rebirth story arc by Tim Seeley and Diego Bernard.  The Rebirth storyline came out of Artifacts and was heavily promoted when it appeared in the core Witchblade comic title. 
Top Cow Productions also promoted this trade paperback volume with its Free Comic Book Day issue, which featured a new Seeley script over remixed art from the first four issues.  That serves as an intro to the storyline which can be read in full in the new intro-priced trade paperback volume. 
After the Witchblade Rebirth collection, The Darkness will follow (see "Top Cow's 'Rebirth' Comes to 'The Darkness'").