Some feel they basically cover the same ground, and others think that while both refer to age categories teen covers 12-14, and YA is aimed at about 14+. For the latter, the later Harry Potter books, in which torture and murder come to the fore after the gentler series beginnings, would count as teen.
Isle of Coll. One of Scotland's Inner Hebrides, the island of Coll, 13 miles long and 3 miles wide in parts, is nowadays home to some 150 people. Located to the north-west of the Isle of Mull, it is just north of neighbouring Tiree.
The west coast is, in a straight line, 416 km. long, but in reality (because of the many bays) 3200 km. Scotland counts 790 islands, of which 130 are inhabited. Geografically Scotland consists of 2 parts: the mainland and the islands.