Fear the Drowning Deep Square: A lich summons a plague of were-sharks to bring down civilization.
At the end of 'Forge' the party has befriended a war-forged with psionic powers, so you think that their missions would be getting easier. However, the dragon wand that was snatched from them and the loss of Makala to darkness means the party has a lot of work to do.
An ancient demonic curse, an island plagued with undead, unholy pacts, and just the existence of were-sharks makes for a compelling adventure on the sea. Waggoner fit a lot into these stories and provided satisfying conclusions to character's individual story-arcs, two romantic plots (and a bromance), and makes a case for returning to these characters.
I'm not sure they did. Waggoner wrote one more novel for Eberron, 'Lady Ruin', which doesn't name-check any of the characters from the 'Blade' trilogy. With these tie-in novels to D&D, Wizards of the Coast tries to be crafty and instead catches itself in a trap. 'Dragonlance' and 'Forgotten Realms' were dominated by characters created by one or two authors - this created internal consistency and reader loyalty, but also meant that the campaign setting was beholden to creative that may not want to write the stories they're told to write. To avoid this Wizards pushed out a LOT of novels in a short period by many different authors. This mixed bag probably created some short-term cash-flow, but the market was saturated and the books quickly went out of print.
I for one would have been happy to see a core story-line produced. It would only increase sales of the core product (the pricey D&D manuals) and keep the brand alive. There is a new Eberron Adventure coming out for 5th edition this fall, we'll see if there's any novel tie-ins.
Anyway, this is the strongest group of Eberron novels so far. Obviously recommended to D&D and Eberron fans, but also fans of fantasy-horror.
The Blade of the Flame
Previous: 'Forge of the Mindslayers'