Books with title Buffy The Vampire Slayer set

A huntress is stalking demons in L.A. Normally this would be a good thing, except she`s leaving survivors and telling them Angel sent her. Now Angel has an army of demons on his tail, hell-bent on revenge. What`s a vampire to do? And how long can his human companions, Cordelia and Wesley, remain safe? Meanwhile, monsters are fleeing the carnage in L.A. and seeking refuge in Sunnydale, where they`re being dealt with by the Slayer. Buffy, Giles, and the gang learn about the havoc, and Buffy determines that she must go to Angel`s side to lend a hand; a decision that does not sit at all well with Buffy`s vampire-hunting boyfriend, Riley. Collecting issues #15-16 of Angel and issues #29-30 from Buffy the Vampire Slayer.