I picked this up in a charity shop, and have only just discovered that Sewell later re-modeled it, but the edition I bought still has great charm and interest.
As an art critic you expect Sewell to tell you about the classical sites he visits on several trips to Turkey, and you are not disappointed. The descriptions of both the locations and the relics bring them to life; you can see them as clearly as the author. There are no photographs, only reproductions of earlier visitors' sketches. This is necessary as many of the remains are no longer in situ (they're often to be found in the British Museum). As the book is about his travels you may also expect descriptions of the land and the people he meets, and again you are not disappointed; Sewell clearly loves Turkey and the Turks and this is made clear without patronising the locals, although you can always hear Sewell's distinctive voice ("like a 1930s lesbian" as he once described it himself). What you may not expect is the frequent diversions into anecdote and tall tale, most of which are of a sexual or lavatorial nature, but you get them as well.
This is an interesting study, by an expert, of classical art and architecture in the home of civilisation, but it is no dry as dust academic book.