Google’s advertising business has begun losing market share in the US, with competition from Amazon, Facebook and Microsoft intensifying in search and display

In response, the company is redoubling efforts to reshape its apps, services, and the entire web for more efficient monetisation, spelling uncertainty for partners and users

The adaptability and complexity of Google’s services reduce business risk from targeted regulatory measures, but increase the pressure for a radical intervention

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Amazon’s recent deals with Apple in TV, music and device sales mark a turning point after a decade of frosty relations

The context for this involves shifting priorities at both firms, growing pressure on Apple’s iPhone business, and rivals in common — first and foremost Google, but also the likes of Netflix and Spotify

The uneasy alliance helps both companies consolidate their strengths in the platform competition over media and the connected home — but trouble already brews

Audiobooks are growing fast, driven by smartphone adoption and better supply, as well as interest from people who don’t usually buy books, such as young men

The sector is dominated by the presence of Audible, Amazon’s audiobook publisher/retailer, which has driven growth of audiobooks but put publishers under pressure. Its strategy is a lesson in Amazon’s approach to media

Audio is an opportunity to sell to new customers, but publishers must acquire and use rights responsibly, and experiment while not letting the audio tail wag the print dog