From the press release:

DARK HORSE DIGITAL CELEBRATES OVER 70,000 DOWNLOADS!

MAY 18, MILWAUKIE, OR—Dark Horse Digital has entered its third week and is outperforming even our highest expectations! To celebrate, we’ve added yet another free issue. For the next 24 hours (May 19^th), Dark Horse has made the full first issue of B.P.R.D.: Hollow Earth available at no cost.

Hollow Earth picks up just after Hellboy’s departure from the Bureau for Paranormal Research and Defense, beginning what will become a new direction for this series. After a vision appears to Abe Sapien warning of danger for the missing Liz Sherman, he takes a very irregular group of agents on a mission that could lead them right through the center of the earth.

We want to thank all of our digital-comics fans and supporters for helping to make the first month of the Dark Horse Digital program such an early success. Head over to Digital.DarkHorse.com today to find this and dozens of other free titles and unlock an all-new reading experience!

Additionally, other top titles to be released this week include:

B.P.R.D.: Killing Ground #1–#5
Emily the Strange #3: The Dark Issue
Falling Skies #4
Kazuo Koike’s Samurai Executioner Vol. 1
The Goon #2
Turok: Son of Stone #2

Related posts:

1. Dark Horse Presents #1 Comes to the Dark Horse Digital Store!
2. Win Every Dark Horse Digital Title Contest!
3. Dark Horse Digital App & Store ARE LIVE!
4. An Update on the Delays to Dark Horse Digital
5. Dark Horse Digital is Upon Us!