Shadowmoor Cycle
The Shadowmoor Cycle contains two books — the Shadowmoor anthology and the Eventide novel.
It is also deeply connected with the Lorwyn Cycle, since it picks up right where Morningtide left off. Additionally the overarching story does not wrap up until the end of Eventide.
Trivia
Before the release of Eventide there was some confusion about the cycle it belongs to. On the Wizards of the Coast product page for it says "Lorwyn Cycle Book III"[1] while the picture shows "Shadowmoor Cycle Novel".