According to the Legendary Women website, "The Jacquis is an award nominated by feminist readers and given to feminist authors — stellar penwomen who capture the lives of women in their pages. Women of all colors, creeds and backgrounds." This is the inaugural year for the awards program.
The author, Samantha Bryant, says that she wrote the book because of her own frustration with the superhero genre. "There are so few female heroes out there, and even fewer of them with fully adult lives, including partners and careers. I wanted some heroes I could really identify with."
Details about Bryant's book and the other award winners can be found on the award announcement: https://medium.com/legendary-women/legendary-women-presents-the-jacquis-30343e2a6206#.4y4ehx29g