I am going to photoread for direct learning, and have found 8 books directly relevant to the skillset I want to improve, and 3 indirectly relevant. Is there a maximum number of books recomended, or is the sky the limit?

ie:

4 books about presenting and speaking
4 books about motivation and influence speaches

1 book on comedy writing

1 book about vocal technique

1 book about presentations (powerpoint)

I have previously direct learned once, with 5 books, and have enjoyed success.

vitaman