I don't have the exact number off the top of my head. But a quick search on manga forums or asking fellow manga enthusiasts might help you get the answer you're looking for.
Well, as far as I know, the Maximum Ride manga consists of approximately 8 to 12 volumes. But the exact number might vary depending on different editions and releases.
I'm not sure exactly, but there are quite a few. You might want to check the official publisher's website or related comic databases for the accurate count.
The order of the Maximum Ride series is usually determined by the publication date. The first book is 'The Angel Experiment', followed by 'School's Out - Forever', 'Saving the World and Other Extreme Sports', 'The Final Warning', 'Max', 'Fang', 'Angel', and 'Nevermore'.