In Worlds Without End, there was a bit about Harlequin closing some gateway or another for Horrors in Hawaii, but for the life of me I can't remember anything expanding on what exactly happened. Anyone know what went down and where I can read about it in more detail?

The Abstruse One

House of the Sun, by Nigel D. Great. er, Findley--Nigel D. Findley.

it's exactly what it sounds like--a buncha whackos in Hawaii tried to bring the Horrors early, and Harley was involved in stopping it.

I think you will find all you want to know in Mason's excellent review of House of the Sun.