I started reading this just for the novelty of reading something sort of obscure from the 1890's. It's a collection of unrelated stories about how God answered the prayers. I read it not so much for the stories themselves, but for the tone of writing, to see their assumptions and beliefs. Some of the stories have the feel of urban legends: "I have it on good authority, that this one preacher said,..." etc. And some of the incidents seem to have been chosen for maximal emotional impact. Usually the protagonists are faithful, praying women, or poor, sick children.
A representative example: on page 34 we read about this poor, dear child whose mother had died and whose father forced him to steal for a living. He's found hiding in an abandoned, dark tenement house. He had decided to stop stealing food because he had heard "thou shalt not steal" at a mission school, and was hiding from his father who would beat him if he didn't steal. He says "'Thank you sit; but please, sir, would you like to hear me sing a little hymn?' Bruised, battered forlorn, friendless, motherless, hiding away from an infuriated father, he had a little hymn to sing." I can imagine matronly Christian women reading this with tears in their eyes - the poor little dear!
And if that weren't heart-wrenching enough, here's the end of that story: The benefactor goes away to find a place for this poor fellow to say: "The gentleman went away, came back again in less than two hours, and climbed the ladder. There were the chips, and there was the little boy with one hand by his side, and the other tucked in his bosom, underneath the little ragged shirt -- dead."
So yes, it's easy to make fun of some of the stories. But if you are a person who believes God can and does actually heal people, like I do, then you'll find some of the stories living up to the title.