The description comes from the publisher:
Zane Obispo had been excited about entering the Shamanic Institute of Higher Magic, not least because he was then going to see Brooks, his best friend, again. It just would have been better than the three months he had spent looking for the godborn with a nasty demon that could (literally) smell them. But when Zane finds the last teenager on the list, it turns out that it is actually twins – a brother and sister – who are trying to prevent a mysterious artifact from falling into the wrong hands.
When it comes to shocking betrayal, Zane gets to SZWM faster than he had hoped. Even more shocking is the news that the Mayan gods are missing. Kamazotz, the bat god, and Ixquic, also known as the Blood Moon, have neutralized them, and their next target is the Godborn. There is only one thing missing for evil gods to be happy – an object hidden away by twins.
Zane knows the Godborn don’t have the power to fight Kamazotz, Ixquic, and their army. Perhaps there is a chance to save the gods, but for that, you need to find a magic calendar that sees in time and space … Not to mention having to travel thirty years into the past.
In The Shadow Wanderer, Zane sets out with his friends on the most difficult journey to date, a journey that through one mistake they make could change history and, worse, wipe out the universe.
The book is available at: https://galeriaksiazki.pl/pl/p/Wedrowiec-Cienia-RR/395