It is just what the no-nonsense title suggests: a series of stories documenting God's faithful answers to prayer. It's available online from Project Gutenberg, in various formats (html, plain text, Kindle, e-pub, etc.).
Here's the link:
How I Know God Answers Prayer
by Rosalind Goforth
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On the day I called, You answered me;
You made me bold with strength in my soul.
...
Though I walk in the midst of trouble, You will revive me;
You will stretch forth Your hand against the wrath of my enemies,
And Your right hand will save me.
The Lord will accomplish what concerns me [.]
Psalm 138:3, 7-8a