User blog comment:B214/Question & Answers 5/@comment-37.219.117.66-20150802110018/@comment-26668768-20150802135836

http://www.baka-tsuki.org/project/index.php?title=High_School_DxD:Volume_1_Life_0

If you look they also have some pdfs you can download to make the reading easier. Up to volume 12 (on to volume 13 for me)