i definnily don't think they キッス in awakening または the struggle because ive read those 本 and also they don't kissin fury または dark reunion so ill have to wait til i read night fall and also shadow souls. to see what happens between damon and elana.
i think that they had kissed in the fury( 3rd book) when Elena wakes as vampire and think that she's in 愛 with Damon, they'd also kissed in the Nightfall (5th book) when she's healing him from malach, and in Shadow Souls they are キス almost all the time, hope I helped :)
I've read the descriptions of the books, あなた know the bit on the back of them that only gives a little bit away? No idea what it's called. Well, Damon and Elena NEVER actually get together, not according to the texts. But they キッス in the The Vampire Diaries; The Return: Nightfall plus. I don't think they do anything in the last one, need to wait and see when it comes out! Can't wait!!