The Wolves of the Tesseract series came first, but I had already been building a side universe featuring fey mythology, and our heroes cross into if at one point in their adventure. They have an altercation with the Spider Queen of the unseelie court... who my fans will readily recognize as Ragathena from the Curse of the Fey Duelist series (currently also on Kickstarter with the 4th book--both that series and this one feature the same audiobook narrator as they have always been linked into my personal multiverse.)

The omnibus includes books 0,1,2,3.

Just back the newest book in the fey series (Court of the Scorched Throne) and you'll also get Twisted Yuletide unlocking this as an 9 book bundle!