Uncredited in published work

I shot a cookbook's worth of recipes for a national company and I just found out that I'm going completely uncredited. It's taken a while to go to print but a former colleague just saw a pdf and it credits "photography from a variety of sources" with my name nowhere to be found. The work was done for hire and they have full rights to the work but every conversation I had with them indicated they intended to credit me and my stylist properly for our work. It really sucks because this was a big project I spent the better part of a summer on that I'm really proud of and that I was really hoping might give me a bump in picking up new work or talking to agents.

I don't think they have any obligation and it's probably too late to ask for changes (which they lied to me about before anyway) so I guess I'm just screaming into the void here. I am super-pissed but reckon I'm SOL.

Lesson, as always: get it in writing!