Where can I find a Meteor Strike skill book?

Solution 1:

Are you sure your characters are level 16?

All magic/skill book vendors should be selling it upon being level 16.

You should be able to find the books at Silverglen inn (a bunch of vendors sitting together), the pyro elemental in your Homestead or Arhu (2nd floor of legion HQ)

You need Pyrokinetic level 4 to use it. It will cost +2 AP for each level below that. It is also recommended to have 12 intelligence, each level below will reduce the status effect chance by 10%.

Note: In this game, the skill book itself is called "Meteor Strike" but the skill is Meteor Shower.