In recent years there has been a great deal of work done on the Picts and the Scots, but you won't learn anything about that work here. There's nothing much wrong with the book, it is short and readable, but it is seriously outdated. The consensus of opinion on many questions has changed a great deal since the early 1990s, and much that was taken for granted is now rejected or questioned.For a more up-to-date picture, the 2004 edition of Sally Foster's Picts, Gaels and Scots is worth considering.