From what I can tell, the Throne of Atlantis arc is a crossover between Geoff Johns' Justice League and his Aquaman titles. I had been reading Aquaman since the beginning of its run but stopped when the crossover began because I had not started to collect Justice League yet.

I've decided to catch up now but I'm not sure what order to read in (whether I should just alterated between Justice League and Aquaman or read one series before the other).

I'd greatly appreciate any suggestions from those who have been reading.

It alternates from Justice League to Aquaman and back, so start with Justice League #15 then Aquaman #15, then Justice League #16 followed by Aquaman #16 and so on like that. I've been enjoying it, I think Geoff is doing a great job with this crossover and hopefully you will too, have fun reading!

@SupBatz: You migt also want to pick up Aquaman #14, as its a prelude to the whole crossover and has one crucial plot element.