Amazon stock surge makes CEO Jeff Bezos $7bn richer in 45 minutes

Internet retailer turns unexpected profit with sharp sales rise surpassing Walmart as world’s most valuable retail company

Roald Dahl’s gruesome twosome The Twits return in new children’s app

Twit or Miss game kicks off digital strategy to bring Dahl’s characters to young fans, in tandem with the writer’s centenary celebrations next year

EL Doctorow obituary

One of the most celebrated American novelists best known for his historical fiction whose books Ragtime and Billy Bathgate were turned into films

Amazon set to pay self-published authors as little as $0.006 per page read

Writers of shorter works could lose out on revenue as company’s Kindle Owners Lending Library and Kindle Unlimited no longer pay per copy downloaded

Fifty Shades of Grey author EL James now worth £37m

Books, film and merchandising tie-ins help to boost fortune

British children’s stories startup Lost My Name tells a $9m funding tale

After 600k personalised picture-book sales, London firm secures investment from Silicon Valley firms Google Ventures and Greycroft

Fourth Fifty Shades book whips up unprecedented pre-ordering frenzy

The new book, Grey – this time written from Christian Grey’s perspective and published on 18 June – is set to dominate the publishing world once again

YouTube star PewDiePie strikes publishing deal for This Book Loves You

With 37m YouTube subscribers, Swedish gamer teams up with Penguin Random House for 250-page collection of ‘advice and inspirational quotes’

European commission to investigate Amazon’s ebook dominance

US tech sector’s problems with Brussels deepen as competition chief focuses on allegedly restrictive contract clauses

New James Bond novel Trigger Mortis resurrects Pussy Galore

Anthony Horowitz has drawn on an unseen Ian Fleming script for latest authorised 007 sequel

DC Comics pull cover of Batgirl menaced by Joker after online protests

Fans of female superhero distressed by misogynist tone of special edition artwork, while others say protest row has led to censorship

Apple’s Eddy Cue on ebooks price-fixing war: ‘I’d do it again’

iBooks chief fighting US court ruling that the company ‘conspired’ to fix prices in its competition with Amazon’s Kindle is defiant before trial. Tim Cook ‘feels the same’