SOLVED. Recent book with a black tree on a yellow cover [s]

[Resident Optimist]

This is the book that everyone's reading on the trains and seems to be quite popular at the moment. Any ideas about the name? Apologies for the vagueness but anyone who's seen the book will know what it's called. Thanks :)

[Dree]

We Are All Completely Beside Ourselves?

I have it next in my queue!

[Resident Optimist]

Dree, you're my hero! Thank you :D