Added several videos, courses, and a book

[stjepanjurekovic]

Hi,

Stjepan from Manning here. I thought these videos, video courses, and a book, might be a good match for your list. Thank you for considering them.

Best,

By submitting this pull request, I promise I have read the contribution guidelines twice and ensured my submission follows it. I realize not doing so wastes the maintainers' time that they could have spent making the world better. 🖖

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[sindresorhus]

Thanks for the suggestion, but I prefer that users add the book they would recommend, not a company adding its own books.