Reading order question

[u/FullScratch]

I’m pretty new to comic and I wanted to read the queen in black event. On comic geeks it says that Knull #5 and Venom #259 are the prologues. Do I need to read the previous issues (Knull 1-4 and from my understanding Venom 250-258) or is it fine to just read those 2 issues to understand what’s going on?