[Locke.]

I've only just started the second one now and hadn't read the first when I was watching the show.

It will probably ruin the twists and things but it explains the storylines and characters a lot better than the show has. And every time I googled something to do with the show there would be a spoiler in the suggested search bar.. So I'd rather read it in the book and be shocked than read it on the internet and be pissed off about ruining it