Board Thread:Questions and Answers/@comment-25144197-20180826041238/@comment-28251580-20180826083607

If you want to know the ending now, you will need to read fan-translations on the Internet, they go up to Volume 18 (though not completed as of yet). Yen Press has recently published Volume 14, Alicization Uniting. The manga adapts the Light Novel, so for further content you want the Light Novels and not the manga.

The manga are adapted by arc by different artists, so it does not matter at which point other arcs are. (With the exception of Phantom Bullet and Alicization both done by Yamada Koutarou. The Alicization manga should cover the first Alicization volume by now. But that's the japanese version, there is no official translation of this manga in the west. You can look at Manga Mainpage for more details.