These were Light Novel of High School DxD base on Baka-Tsuki, the only English translate Light Novel site. But I'll give you dirrect link for reading..
Volume 1
Volume 2
Volume 3
Volume 8 -- Life 1, Life 3, Extra Life
Volume 10 -- Life 0, Life 1, Life 2, Life 3, Life 4 - Pawn, Life 5, Life 6 - Emperor - Lion Heart - Indra, New Life(part 4), Extra Life
Volume 11 -- Life 0, Life..., Lost Life (life 1, life 2, life 3, life 4) was on summaries, causes the translation hasn't done yet
These summaries were done by zzhk at animesuki grup, if you cannot read these summaries, please register beforehand and join the grup of High School DxD.
The detail in these are pretty deep, hell i even forgot i was reading a summary instead of a novel
Volume 4
Volume 5
Volume 6
Volume 7
Volume 8 -- Life 2, Life 4, Life 5, Life 6
Volume 9 (Brief)
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Volume 10 (Brief) edit
Volume 11 Life 1 - 3, Life 4
