Here's the blurb:
Poppy Wyatt has never felt luckier. She is about to marry the ideal man, Magnus Tavish, but in one afternoon her ‘happy ever after’ begins to fall apart. Not only has she lost her engagement ring but in the panic that followed, she has now lost her phone. As she paces shakily round the hotel foyer she spots an abandoned phone in a bin. Finders keepers! Now she can leave a number for the hotel to contact her when they find her ring. Perfect!
Well, perfect except the phone’s owner, businessman Sam Roxton doesn’t agree. He wants his phone back and doesn’t appreciate Poppy reading all his messages and wading into his personal life.
What ensues is a hilarious and unpredictable turn of events as Poppy and Sam increasingly upend each other’s lives through emails and text messages. As Poppy juggles wedding preparations, mysterious phone calls and hiding her left hand from Magnus and his parents… she soon realises that she is in for the biggest surprise of her life.
It's a romantic / comedic story that was frequently laugh-out-loud funny, clever, intelligent, and insightful by turns. The world and the characters feel three-dimensional and believable; even the secondary characters are fleshed out well. The plot took a surprisingly moving twist near the end and finished well and although the actual finale was a bit "Hollywood", at least the characters' motivations followed a logical course to get them there and it was satisfying.
Caveats: mentions (although not descriptions) of premarital sex, and quite a bit of foul language.
Conclusion: Somebody should turn this brilliant novel into a romcom screenplay, use Sherlock-inspired cinematography for all the email- and text-based communication, and cast Richard Armitage as Sam Roxton.