So I haven't read Death in The Family but I wanted to pick up the trade paperback for it, that has the main issues. I wanted to know though are the crossover issues related to it worth reading? And how important are they to it? Are they must reads for it?

I read none of the crossovers and I understood everything. They are not important at all. They really just provide background on something that happens in the story, but the main DOTF trade give you a shorter version of what happened, which still isn't even important. I haven't read them so I can't say if they're good or not, but its up to you if you want to read them or not, they aren't necessary.

Nope no need. The tie-ins are primarily for immersion and if you want to dig deeper in the lore of the story arc. You should be able to understand everything by just reading the main DOTF of Snyder and Capullo alone.

Okay.
Thanks.

I just want to know if they are worth reading either because they are great and because they are important to the story.

If they aren't important to the story I'll get the trade.

No real need I'd say. To be honest none of them were too particularly good IMO.

Okay thanks.

The Batgirl, Nightwing and Damian ones were pretty strong though, but the problem is, none of these characters had a very strong payoff at the end. The Joker terrorizes all these characters but the ending to their individual stories are cut short, and the story concludes in the main Batman title, so you'll find yourself a little frustrated if you care about these characters. Now are they essential to the main story? No, you can read it and enjoy it without having read the tie-ins. All they do is show how they got to wherever they go in the main Batman title but that's it. But strictly from a narrative standpoint, the ones I mentioned are strong, the others are weak, but none of them have any real pay-off. If you are interested, they're selling a hard-cover edition called Death of the Family: The Joker, that includes all the DOTF tie-ins.

Death in the Family, or Death of the Family?

Yeah I saw that other Joker trade. I might get it later.

Death Of The Family. Good call, edited the title.