I've read Missing Without a Trace (Book 1) and love it. (See actual review below) I'm closely following book two.

Review:

Packed with action, this story grips your attention right from the start. The disappearance of a research team on a remote island presents a mystery that can’t be ignored. Our heroine finds herself in over her head while she, the local sheriff and her prospective boyfriend attempt to unravel it.

Against all odds she opposes a powerful group of heavily armed personal. The struggle threatens to end badly except for her perseverance and courage under fire.

I bought it at Barnes and Noble. It's also available at Smashwords.com in case you want to read it on your Kindle.