There are 3 books in the Three J'amigos series. The newest book is Jill which came out in 2016.

1
Jade

Book cover of Jade
Meet Jade Smith, a magical mutt with a mission. A detective partnered with a shifter named Rolfe, she’s on the case to solve a slew of murders: Vamps are killing humans, and nobody knows why. When London Jane, the most powerful vamp in town, is implicated in the murders, Jade…
When you buy books, we may earn a commission that helps keep our lights on (or join the rebellion as a member).

2
Jane

Book cover of Jane
Jane & Jade are chasing the Devil around the world. That's probably not the smartest thing to do and when the hunters become the hunted, the action really gets rocking, leading to a non-stop thrill ride of a road trip. Vampires and Shifters, Angels and Demons, throw in a giant…

3
Jill

Book cover of Jill
In the conclusion of the Three J'amigos series Jade and Jane are on a rescue mission. Jill has been kidnapped and the world of Faerie is in turmoil. When Jill is transported to a place from which there is no escape, Jade and Jane must split up in an effort…