“It’s that eye for a deal that makes Always Red, [Len] McCluskey’s own juicy, take-no-prisoners memoir, so riveting. The former Unite leader has a reasonable claim to be the architect of Corbynism, having supported the rule changes under Ed Miliband that later helped the left break through in a leadership election, and then supplied funding, staff and strategic nous to an inexperienced Corbyn operation… The final chapter on how unions can best exert leverage should be required reading for anyone in politics (or business).”