YA Fantasy. Boys enters Medieval Parallel Universe. Read around 2014. Spoiler.

[Nathan]

I remember reading this in year 7 which is now 10 years ago....

A Boy who has an alcoholic mother runs away from home (I think) and then finds himself in a castle which is in another universe.
I remember him learning a bunch of medieval sword skills and his mum dies, I think by suicide after not being able to see her son once she stops drinking.

[Sue]

A man not a boy, but maybe Pawn's Dream by Eric S. Nylund. By night, he works for a grocery store; but by day he lives in an alternate medieval world (real, not a dream) https://www.google.com/url?sa=t&r...

[Becca]

If it's not Sue's suggestion, can you remember if it was set in the UK, the US or elsewhere? Was there magic in the parallel universe? Did you read it by yourself or was it a set book you read together in lessons?

[Becca]

Corbenic by Catherine Fisher looks promising.

[Astra]

https://www.goodreads.com/list/show/8...
here's a list of Medieval fantasy
https://www.goodreads.com/list/show/1...
https://www.goodreads.com/list/show/3...
A couple for parallel universes

[Kris]

Google Books preview of Corbenic by Catherine Fisher - Becca's suggestion:

- https://books.google.com/books?id=2c7...
- There are different cover images.

Kirkus Review:

- "A sullen teen is unwillingly cast as the hero in a modern replay of the Grail Quest. Cal has struggled all his life with his alcoholic, schizophrenic mother, so he leaps at the opportunity to escape offered by his fastidious uncle. But on the way to join him, he accidentally gets off the train in Corbenic, where he encounters a man who calls himself the Fisher King and whose magnificent castle becomes suddenly derelict when Cal refuses to acknowledge the Grail. ..."