Complex sentence: These books are about six children living in a tiny, remote village in Sweden and are set in the late 1930s, a relatively calm time in Sweden although a war "starting soon" is sometimes briefly mentioned in newspapers the kids are reading.
Split into simpler sentences: These books are about six children living in a tiny, remote village in Sweden. The period is about late 1930s, the relatively calm time in Sweden although a war "starting soon" is sometimes briefly mentioned in newspapers the kids are reading.