SOLVED. A book with a mirror on the cover and a medusa in stone it's about a boy who goes through the mirror and one day his brother follows him and gets sick and starts to turn to a stone goblin troll thing [s]

[Anna]

Please I need help

[Anna]

Thank u

[Ann aka Iftcan]

Brianna--is that your book or books?

[Lobstergirl, au gratin]

Let's assume it is.

Tragedy strikes when Jacob's younger brother, Will, follows him through the portal. Brutally attacked, Will is infected with a curse that is quickly transforming him into a Goyl--a ruthless killing machine, with skin made of stone.