Paula Spencer (Viking Adult) written by Roddy Doyle, is currently available in paper and digital formats (Kindle for $9.99). Didn’t bother to check anywhere else.
I remember reading somewhere that JK Rowling was a big fan of this author. Doyle also penned The Commitments which was also made into a hit film of the same name (never seen it). So I started browsing to see which book to start with first and came across this reader’s comments.
About Roddy Doyle’s Paula Spencer 
I’m surprised to be recommending a book about an alcoholic middle aged mum so enthusiastically, but if you read Paula Spencer and don’t love it, there’s a good chance you’re an idiot.
Bought. Synopsis & excerpt of Paula Spencer