Okay, here's some more clues for questions #17 & #18:

The series of books I'm referring to were used in schools to teach children how to read and they usually have the the word "Fun" in the title.

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Also, here's a clue for the extra credit question about the single name of the woman referred to in the Ivanhoe question: This old testament Biblical female name is the same as the title & name of the girl who is the lead character in the children's novel about Sunnybrook Farm.