I had read this as a teenager, and was very interested to find out how it stood up on rereading. It remains rather good - the protagonist is a mid-century American kid with the innate gift of time-travel, which he controls rather better than the husband in The Time-Traveller's Wife. There's a lot of politics here, as a white supremacist time-traveller tries to set up a racist principality at the end of time; can he be stopped, given that time appears to be immutably set in its tracks?

This was also the book from which I learned about the Fourth Crusade; somehow I simply hadn't heard of it before, and Anderson's portrayal of the brutal rupture of Christendom was a vivid historical eye-opener. All the good bits were as good as I remembered, and the bits I didn't remember were not bad at all.