If it's the 1967 Hodder & Stoughton edition, you're safe. That's actually the edition that led me to notice the 2014 e-book was abridged (and I've compared it to the first edition). The e-book seems to be based, for some reason, on a 1964 Peacock Books YA edition (which imprint also did the bowdlerized YA edition of Sword at Sunset.)

What was cut out: graphic violence, anything vaguely suggestive of sex, lengthy description or material that builds theme or character but not plot.