SOLVED. Childrens story, featuring a scene where a boy has to use Stone Henge to amplify his power to return to a magic world. [s]

[Lobstergirl, au gratin]

Is it on these lists maybe?

https://www.goodreads.com/list/show/2...

https://www.goodreads.com/list/show/8...

[Lobstergirl, au gratin]

Check these juvenile fiction books on worldcat, searched by keyword "stonehenge"

https://www.worldcat.org/search?q=kw%...

[Pixiegirl105]

Not sure if this. Been awhile since I read these but maybe The Dark is Rising series?
https://www.goodreads.com/series/4442...

[Rosa]

That's great! Beaver Towers for future reference.