Immortal Hulk Omnibus

Hello,

I'm a fairly new Hulk reader. I finished Planet Hulk and World War Hulk recently and just read through Infernal Hulk #1, but it's very clear that I'm jumping onto this missing quite a bit of context. I want to read Immortal Hulk, but it's not clear to me what the best way to do that would be. I see a hardcover Omnibus on Amazon for around $80, which I'd be willing to grab if that really is everything I need. Is that omni all the required reading for me to catch up?