One difference between tourist guides and travel literature might be that the guidebooks are good references while you're on the road, whereas travel literature can get you in the travel mood, help you remember where you've been, or be a vicarious substitute for actually leaving home. What makes "In Search of London" such a great book -- and why it remains in print more than 50 years after its first publication -- is that it transcends most other books of travel essays I've read and is also a book that I could easily see myself carrying with me on the streets of London, pausing in St. Paul's or along the Embankment to re-read a section of Morton's great prose.
I was able to visit London last spring, and while I was there was very aware of the history that surrounded me. Henry Morton's prose has that sense too, but to an infinitely more developed degree. Reading this, you get the feeling Morton can almost see the specters of Roman soldiers, Elizabethan yeomen, striding Cavaliers or bustling Edwardians filling the pavements around him. Whether he goes up in the Monument or down under Trafalgar Square, Morton seems to be occupying several periods in history simultaneously. It's a very difficult feat for a writer to pull off -- and harder still for one to do it without giving the sense one is a historical exhibitionist, dropping names and dates just to prove one can.
I'm not sure how exactly I stumbled upon H.V. Morton's name and writings, but I am very glad I have. "In Search of London" has given me, I think, one of my new favorite writers as well as a wonderful look at one of my very favorite cities. I'm now well into "In the Steps of the Master," Morton's 1934 chronicle of his visit to the Holy Land, and I can see that "In Search of London" wasn't a fluke: Morton really is that good a writer, a storyteller, and a man who really knows his history.
Keep in mind that "In Search of London" was published in 1951, and so there are many mentions of bomb damage and other relics of the late war. It will take a little of the reader's imagination to carry the narrative, and the sense of place, forward to 2007 and beyond. But any reader who dives into Morton's work and lets his narrative carry you along as I did shouldn't have too much trouble doing that. Even today, this is still an excellent guide to what makes London what it is, and certainly worth making room for it in your suitcase, as well as on your bookshelf.