As usual with Gaiman it is a positive smorgasbord of different styles, featuring a few poems (my least favourite of the content) jostling with a host of short to medium length stories that encompass science fiction, fantasy and horror. There's even a Doctor Who story, featuring the Matt Baker incarnation. My favourite was a longish story featuring the character Shadow from American Gods, but the range is excellent, both because it means that even if you don't like something, something completely different will be along soon, and it forces you to read in genres and styles you wouldn't normally bother with, often with considerable pleasure.
This is without doubt an excellent collection, and though it didn't quite work as well as his earlier Fragile Things for me, which is one of the best short story collections I know, it is certainly one that I will re-read with pleasure.
You can find Trigger Warning at Amazon.co.uk and Amazon.com