Introduced Me VS. Introduced to Me [duplicate]
Which sentence is correct?
I have read the books that you had introduced me.
I have read the books that you had introduced to me.
Your first sentence is incorrect but your second sentence is absolutely fine :)
Regarding the comments on your question,
... that you had introduced me to
is more idiomatic when speaking. It does, however, mean that you are ending a sentence with a preposition. I would say that it's best to avoid doing that when writing in a more formal context.