Recently, I came to know that there are 336 prepositions in English via reading an OUP blog:
... . And now the lowly preposition is finally getting the attention it deserves with The Preposition Project (TPP), a monumental undertaking that systematically describes 673 distinct senses for 334 prepositions in English.
I tried my best to find over 330 prepostions in English, but could find a PDF book (written by Josef Essberger) that just provides 150+ prepositions, from which 40% are phrasal prepositions.
Is there any book which can provide over 300 single-worded prepositions? I am from Pakistan, and I hope that those books would be available on major cities like Karachi and Islamabad. If it's not feasible, what PDF documents are there to fit this need? Can you yourself provide over 300 prepositions?