Ursula K. Le Guin, the Hugo and Nebula award-winning author of “The Dispossessed,” “The Left Hand of Darkness” and the “Earthsea” series of children’s fantasy novels, seems to be enjoying a well-deserved “moment” in the latter days of her career as a literary icon. Popular and critical interest in the work of the 88-year-old Berkeley native and Portland, Ore., writer was reinvigorated in 2014 when Le Guin received the National Book Foundation’s Medal for Distinguished Contribution to American Letters.