This Seanan McGuire bundle includes books on two of her series:

October Daye series (2009-)

"After being missing for fourteen years, private investigator October "Toby" Daye returns to a human world that presumes her dead. Reluctantly, she returns to the politics and dangers of faerie society and gradually becomes both feared and celebrated as a hero among the fae."

√ Rosemary and Rue
√ A Local Habitation
√ An Artificial Night
√ Late Eclipses
√ One Salt Sea
√ Ashes of Honor
√ Chimes at Midnight
√ The Winter Long
√ A Red-Rose Chain
√ Once Broken Faith
√ The Brightest Fell
√ Night and Silence
√ The Unkindest Tide
√ A Killing Frost
√ When Sorrows Come
Be the Serpent
Sleep No More
The Innocent Sleep
These Violent Delights

√ Full of Briars - short fiction set after Chimes at Midnight.

InCryptid series (2012-)

"InCryptid is a series of urban fantasy novels ...[that] follow multiple generations of a family of cryptozoologists who protect supernatural beings from discovery by humankind."

√ Discount Armageddon
√ Midnight Blue-Light Special
√ Half-Off Ragnarok
√ Pocket Apocalypse
√ Chaos Choreography
√ Magic for Nothing
√ Tricks for Free
√ That Ain't Witchcraft
√ Imaginary Numbers
√ Calculated Risks
Spelunking Through Hell
Backpacking Through Bedlam
Aftermarket Afterlife

So all books except the last few in each series. 25 novels for $18. Not a fan of the genre but intrigued about female-protagonist stories. In the end decided not to get this bundle.