Astrid Lindgren, the author of the inimitable Pippi Longstocking, knew all about superhuman strength. She had it as a young girl. At least, she had to believe she did. To get through a traumatic pregnancy and separation from her baby. “You can do it.” That’s what people told young Astrid over and over when she felt she couldn’t take it on alone. But, she did. Because what else is there to do when no one’s willing to help? Not her parents. Not the father of her baby. So, this is where Becoming Astrid began. She had to rise up out...