The series went from good to bad and it looks like her contract was not renewed/canceled/godKnowsWhat. (Aug 7 2015) https://twitter.com/Rob_Thurman/status/629726580236001280
Tweet above implies there is supposed to be an 11th one in contract. But who knows, maybe she made a mistake.
EDIT: might have something to do with the Penguin and Random House merger.
It's available in the Shadowed Souls anthology that Jim had a hand in editing.
"Shadowed Souls". Ed. by Jim Butcher and Kerrie L. Hughes. https://www.amazon.com/Shadowed-Souls-Jim-Butcher/dp/0451474996
I only got the name of the 1st short story collection:
https://www.amazon.com/gp/product/0451474996/ref=ox_sc_mini_detail?ie=UTF8&psc=1&smid=ATVPDKIKX0DER
What was the butters one in?
It's in Shadowed Souls, Amazon non-affiliate Smile link: https://smile.amazon.com/Shadowed-Souls-Jim-Butcher/dp/0451474996/ref=sr_1_1?ie=UTF8&qid=1479605708&sr=8-1&keywords=shadowed+souls
The last novel release was Nevermore: https://www.amazon.com/Nevermore-Leandros-Novel-Rob-Thurman/dp/045147340X (Dec 1 2015)
The last leandros-universe short story release was "Impossible Monsters" in the anthology "Shadowed Souls". https://www.amazon.com/Shadowed-Souls-Jim-Butcher/dp/0451474996/ (Nov 1, 2016)
The series went from good to bad and it looks like her contract was not renewed/canceled/godKnowsWhat. (Aug 7 2015) https://twitter.com/Rob_Thurman/status/629726580236001280
Tweet above implies there is supposed to be an 11th one in contract. But who knows, maybe she made a mistake.
EDIT: might have something to do with the Penguin and Random House merger.
The author self-proclaimed that there would be a potential kickstarter release more info here: http://robthurman.net/urban-fantasy/new-cal-leandros-series/
But that was (Oct 24) 2015, so I don't think it is going to happen.
I don't follow her facebook, and it looks like it might be private, so I don't know any up to date information.