Stolen by Lesley Pearse

When a beautiful blonde girl is found half-drowned on a beach, she has no memory of who she is or what horrors have left her there. But an article about her in a Brighton newspaper rings alarm bells for beautician Dale, who shows the police photographs of Lotte Wainright. The girls met working on a cruise ship and their friendship blossomed as they sailed the seas of South America, until Lotte fell under the sinister influence of an older American couple. To her regret, Dale hasn’t seen Lotte since leaving the ship months earlier … but the girl on the beach – although badly bruised – is indeed her much missed friend.

Their reunion only marks the beginning of a dangerous tidal wave of secrets, lies and nightmares. Where has Lotte been? Who is the man who seems to want to kill her? And what has become of the baby she’s recently given birth to? Dale and Lotte must dig deep and find the strength to hold on against the odds if they are to rebuild their friendship and survive Lotte’s stolen – and deadly – past...

About a third of the way into this I became convinced I'd read it before. I'm still sure I had, but couldn't remember enough of it to stop reading (it was just as I was reading that it was actually familiar, I couldn't remember how it ended tho). It's quite a good read other than that tho, not quite the fluff that the cover suggests.