I have started reading the Scala book (which doesn’t seem to have its own URL, but is for sale at the artima.com shop) and I have two remarks on programming-language books.
In any such book, the first example program should print the string “Hello world.” There are no exceptions to this rule, except that an exclamation mark may replace the closing period.
I am getting really, really bored with factorial and Fibonacci algorithms. It is really remarkably infrequent that I implement any code that looks much like either.
[Update: DeWitt Clinton disagrees, pounding Fibonacci to a bloody pulp with erudition and grace.]