Most times these books are only free for a day or two, so you have to grab them while you can. Worry about whether you really want to read it later if it seems interesting. And be careful, they can change from free to not free at any time. I have also decided to list books for no more than 3 days in a row to avoid cluttering up the posts, unless there is some reason I think the book deserves extra attention.
From the top 100 free list
Shadow Bound (Shadow series)
Some people will do anything to avoid it. Even trade their immortal souls for endless existence.
Secretly, inexorably, they are infiltrating our world, sucking the essence out of unsuspecting victims with their hideous parody of a kiss.
Adam Thorne founded the Institute to study and destroy his monster of a brother, but the key to its success is held in the pale, slender hand of a woman on the run. There is something hauntingly different about Talia O’Brien, her unknowing sensuality, her uncanny way of slipping into Shadow.
This is the place between life and what comes after - a dark forest of fantasy, filled with beauty, peril, mystery. And Talia is about to open the door.
The Lost Ark
[#16 - 2nd day. From an author regularly on the top 100 free list. Some of the lesser reviews indicate it could use a good editor.]
JET (International Action / Adventure Thriller)
Twenty-eight-year-old Jet was once the Mossad's most lethal operative before faking her own death and burying that identity forever. But the past doesn't give up on its secrets easily.
When her new life on a tranquil island is shattered by a brutal attack, Jet must return to a clandestine existence of savagery and deception to save herself and those she loves. A gritty, unflinching roller-coaster of high-stakes twists and shocking turns, JET features a new breed of protagonist that breaks the mold.
[#66. From an author regularly on the top 100 free list. This one has been free several times before that I recall. I have yet to read it.]