I read a few books in a series of novels with a female protagonist. She was either severely injured or very ill in 'our world', but she was able to travel to another dimension. They referred to the places where you could move back and forth from 'our world' to the other as 'thin places.'
I believe it was written by a female author, and I remember really enjoying it, but cannot remember the name of the series, the author or any of the titles! :(
Please help me find this book!