OK, I'll start it up.
Here are my three choices; vote for your favorite! I'll leave it up till Monday afternoon since the weekend is coming.
A lot of us mentioned mystery so here's one
Visitation Street, by Ivy Pochoda
320 pgs
Two teenage girls escape the stifling heat of a July night in rough-and-tumble waterfront Red Hook, Brooklyn, by taking a moonlit paddle into the harbor. One washes up ashore, barely alive; the other disappears. As the locals are drawn together by the event, characters gradually reveal themselves in a mystery that is nothing short of riveting.
http://amzn.com/0062249894
I've had this on my must read list for a while and seemed apt for a baby site book club.
The Light Between Oceans, by M. L. Stedman
352 pgs
After four harrowing years on the Western Front, Tom Sherbourne returns to Australia and takes a job as the lighthouse keeper on Janus Rock, nearly half a days journey from the coast. To this isolated island, where the supply boat comes once a season and shore leaves are granted every other year at best, Tom brings a young, bold, and loving wife, Isabel. Years later, after two miscarriages and one stillbirth, the grieving Isabel hears a babys cries on the wind. A boat has washed up onshore carrying a dead man and a living baby.
Tom, whose records as a lighthouse keeper are meticulous and whose moral principles have withstood a horrific war, wants to report the man and infant immediately. But Isabel has taken the tiny baby to her breast. Against Toms judgment, they claim her as their own and name her Lucy. When she is two, Tom and Isabel return to the mainland and are reminded that there are other people in the world. Their choice has devastated one of them.
http://www.barnesandnoble.com/w/the-light-between-oceans-ml-stedman/1107086384?ean=9781476708492
This is spurred by discussion on the board of a extra "wife"!
Busy Woman Seeks Wife, by Annie Sanders
303 pgs
To a casual observer, Londoner Alex Hill is every inch the calm and collected executive of a global sportswear company. In reality, she's constantly frantic, with barely enough time to take out the trash. When her demanding mother, a 1960s style icon, has a bad fall and has to move in with her indefinitely, Alex realizes she needs someone more committed than a maid-what she needs is a wife. An ad in the local paper soon produces a young woman who seems both enthusiastic and capable. But something odd is definitely happening behind the scenes of Alex's new, perfectly ordered existence. Someone distinctly male is charming her mother as well as doing all the ironing. He's no one Alex would ordinarily ever notice, never mind date. But now she can't help wondering if her new "wife" could perhaps have husband potential...
http://amzn.com/0446505447