The Summoning — Troy Denning

From the depths of the demiplane of shadow comes a new magic so mysterious it confounds even the Chosen of Mystra.

From beneath the dune seas of Anauroch escapes one of Toril's most powerful and ancient evils -- the phaerimm.

From Evereska, the last elven refuge on comes word of invasion.

From nowhere appears a group of enigmatic sorcerers determined to destroy the phaerimm and save Evereska . . . for purposes known only to themselves.