SMS messages integrated into book’s storyline

Cecelia Ahern is part of a literary school known as Post-Office Modernism. Her books revolve around letters and their modern equivalents, email and SMS.

…So reports the Sydney Morning Herald in their brief book review of Where Rainbows End by Cecelia Ahern.  To judge it by its cover, it looks very much like a chic-lit book. 

To quote an Amazon reviewer:

It is a cleverly written story told in the form of emails, instant messages, letters and text messages which span 45 years.