The Story of the Amulet
Anyway, for some reason, I wasn't as fond of The Story of the Amulet, though it was a time travel story and contained lots of the same elements as the other two stories: the same cast of children, the same sly humour, the same absorbing magic, and the delightfully grumpy Psammead.
But... I was surprised and dismayed to note how the story is marred by several instances of really gratuitous anti-Semitism. Did I pick up on that as a child reader? I think I actually did, and it made me so uneasy that I didn't return.
I decided to re-read this time because the elder daughter and I have just finished reading a 1940s book about archaeology* which has proved to be surprisingly engaging (it was a classic of its time, apparently, and may have kick-started the Indiana Jones trope of the archaeologist as adventurer), and took us to Babylon, ancient Egypt, Tyre and even the destruction of Atlantis. And apart from the gross and disappointing anti-Semitism, which was completely unnecessary to the plot, The Story of the Amulet is great.
Another episode I had forgotten was the chaotic visit of the Babylonian Queen to Victorian London, which surely must have 'influenced' a very similar scene in CS Lewis's The Magician's Nephew, though the figure of Jadis is more chilling than the flighty young Queen.
*Gods, Graves and Scholars by C.W. Ceram, 1949. Apparently Ceram is the pseudonym of a former Nazi propagandist -- I bet he was successful, he writes really well, even translated from German.