Regex : split on '.' but not in substrings like "J.K. Rowling"

I am looking for names of books and authors in a bunch of texts, like:

my_text = """
    My favorites books of all time are:
    Harry potter by J. K. Rowling, Dune (first book) by Frank Herbert;
    and Le Petit Prince by Antoine de Saint Exupery (I read it many times). That's it by the way.
"""

Right now I am using the following code to split the text on separators like this:

pattern = r" *(.+) by ((?: ?\w+)+)"

matches = re.findall(pattern, my_text)

res = []
for match in matches:
    res.append((match[0], match[1]))

print(res) # [('Harry potter', 'J'), ('K. Rowling, Dune (first book)', 'Frank Herbert'), ('and Le Petit Prince', 'Antoine de Saint Exupery '), ("I read it many times). That's it", 'the way')]

Even if there are false positive (like 'that's it by the way') my main problem is with authors that are cut when written as initials, which is pretty common.

I can't figure out how to allow initials like "J. K. Rowling" (or the same without space before / after dot like "J.K.Rowling")

source https://stackoverflow.com/questions/75196453/regex-split-on-but-not-in-substrings-like-j-k-rowling

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