Thank you in advance!
(The black background might be part of the font, but I'm not sure...)

Milagro  Suggested by koeiekat 

are you sure it's a font?

Yes. I have seen it then different locations, all books.

Just the No. 4 in several books?

No, all the letters of the alphabet and all the numbers, so I'm sure it's a font. I'm trying to find another example now...

If that was so easy, why just post the No. 4 and the BS "(The black background might be part of the font, but I'm not sure...)"??

I thought the number 4 would be more unique/more easily identifiable. I'm sorry.
Is the above example enough?

Enough But... could be a different font with similar style

No, the 4 came from a book in which numbers like this one were at the beginning of Chapters, and the first sentence of each chapter was the in the font of the text I gave you. That's not enough proof, but I'd say it's possible it's the same font, right?

Now kids, that wasn't that difficult. Was it?

Thanks, God, for solving this It's like a "Milagro"

jaja, de wonderen zijn de wereld nog niet uit

Thank you, heel heel goede kat!

One for the bankrupt cedilla