How many books with rags to riches success stories did Horatio Alger write?

Horatio Alger wrote over 130 books, and they almost all fit the "rags to riches" genre.

While the exact number of books Alger wrote with this theme is difficult to pin down, it's safe to say that the vast majority of his works featured young men overcoming poverty and hardship through hard work, honesty, and a bit of luck.