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OFTEN, feminist non-fiction spends too long focusing on depressing statistics about discrimination, abuse and inequality without even attempting to provide any solutions to these widespread problems. Lean In is different.

From the proactive title to the very last words – ‘‘join us!’’– Sheryl Sandberg wants women to be ‘‘filled with energy, optimism and self-confidence’’ and she’s got both the stats and the solutions to make that happen.

In this updated edition of the 1.5 million selling book, the Facebook COO adds six extra chapters aimed at graduates, including detailed advice on job hunting, CV writing and salary negotiation. There are also first-person accounts from women and men about how they leaned in – not just in the workplace but at home, school and online – by answering the question ‘‘what would you do if you weren’t afraid?’’

Katie Wright