Feature request: Provide an argument to resume downloading at a certain position

[tomtom]

Allow to restart downloading titles from a certain position. I didn't fully dig into the code, but assuming that the order of the results from download_springer_table is stable, it would be sufficient to change the definition of download_springer_book_files to something like this:

download_springer_book_files <- function ([...], start = 1) {
    [...]
    for (title in springer_books_titles[start : lenght(springer_books_titles)]) {
        [...]
    }
    [...]
}

[renanxcortes]

In closing #3, I added a feature that checks the existence of the file before downloading it and saving it. Therefore, I think this issue is already contemplated in a certain way.