User blog:Goku259/where to find manga

ok i cant find any manga of highschool DxD because im new to the manga i been wacthing the anime i looked all over like crazy but could only find up to the first chapter of volume 4 i know there is 12 in exsistence now issei died or something like that i just wanna know where to find manga so i can get caught up and plese let it be on internet and absolutely in engilsh but it doesn't have to be on the internet

and....................HOW DID ISSEI DIE