They should really begin with the [[Changeling by Steve Feasey|first book]] in the series. If all things bitey and lycanthropic is their big bag, they'll also like [[The Summoning (Darkest Powers 1) by Kelley Armstrong|The Summoning]], Kelley Armstrong's YA spin-off from her hugely successful [[Personal Demon by Kelley Armstrong|Women of the Otherword]] series. There's no Wolfan in [[The Last Days by Scott Westerfeld]], but there are some superbly sexiful bitey things, and a very different take on vampirism.