I have no idea about the age of this book, only that it can't be all that new. I read it at around the age of ten, which would be 30 years ago.

In the story there was a boy and a girl (if I recall correctly) that were enabled somehow (sadly I can't remember) to shift between two parallel versions of Earth. One was our world and one was a kind of desolate wasteland which was inhabited by frightening monsters.

Locations in the two worlds were mirrored, so that what might be a factory in our world was perhaps a castle in the other world, and this enabled them to get into locations that were inaccessible in one world by getting into the "mirror" location and then shifting.

I only really remember one powerful scene where one child is cornered by a horse like monster with a skull head and is about to be captured, but the child shifts to our world and finds the monster is a horse skull mounted on a post.

I have no idea about the age of this book, only that it can't be all that new. I read it at around the age of ten, which would be 30 years ago.

In the story there was a boy and a girl (if I recall correctly) that were enabled somehow (sadly I can't remember) to shift between two parallel versions of Earth. One was our world and one was a kind of desolate wasteland which was inhabited by frightening monsters.

Locations in the two worlds were mirrored, so that what might be a factory in our world was perhaps a castle in the other world. This enabled them to get into locations that were inaccessible in one world by getting into the "mirror" location and then shifting.

I only really remember one powerful scene where one child is cornered by a horse like monster with a skull head and is about to be captured, but the child shifts to our world and finds the monster is a horse skull mounted on a post.

I have no idea about the age of this book, only that it can't be all that new. I read it at around the age of ten, which would be 30 years ago.

In the story there was a boy and a girl (if I recall correctly) that were enabled somehow (sadly I can't remember) to shift between two parallell versions of Earth. One was our world and one was a kind of desolate wasteland which was inhabited by frightening monsters.

Locations in the two worlds were mirrorred, so that what might be a factory in our world was perhaps a castle in the other world, and this enabled them to get into locations that were inaccessible in one world by getting into the "mirror" location and then shifting.

I only really remember one powerful scene where one child is cornered by a horse like monster with a skull head and is about to be captured, but the child shifts to our world and finds the monster is a horse skull mounted on a post.

I'm sorry I'm so vague. Does this strike anyone as familiar?

I have no idea about the age of this book, only that it can't be all that new. I read it at around the age of ten, which would be 30 years ago.

In the story there was a boy and a girl (if I recall correctly) that were enabled somehow (sadly I can't remember) to shift between two parallel versions of Earth. One was our world and one was a kind of desolate wasteland which was inhabited by frightening monsters.

Locations in the two worlds were mirrored, so that what might be a factory in our world was perhaps a castle in the other world, and this enabled them to get into locations that were inaccessible in one world by getting into the "mirror" location and then shifting.

I only really remember one powerful scene where one child is cornered by a horse like monster with a skull head and is about to be captured, but the child shifts to our world and finds the monster is a horse skull mounted on a post.