Novel Grammar Mistakes

I have been reading a lot of novels lately that, in spite of professional editing, reveal the most appalling grammar in the narratives.  I am not speaking of complex grammatical constructions but some of the simplest.. and dumbest.. mistakes around.  No one's perfect, least of all me.  But c'mon, you guys.. these are elementary.

Compound nouns and pronoun.mistakes

Which is correct?

Lady Angelique gave the news to Marie and me.

-or-

Lady Angelique gave the news to Marie and I.

The way to figure the answer is to remove "Marie and' and try it with just "I" or "me".   It's obvious now, right?    I bet you are saying, "You can't seriously mean to tell me you saw this done wrong in a novel!" Not just one!  The official rule is that "I" can only be the subject of a verb and "me" the object.  So while "Marie and I (subject of 'gave') gave the news to lady Angelique" is correct, it is "Lady Angelique gave the news to Marie and me (object of 'gave't)."

Then there is "lie" and "lay". 

Is it:

I can picture Clem laying in the tall prairie grass.

-or-

I can picture Clem lying in the tall prairie grass.

This is actually a sentence in the novel i am reading right now.  You would not believe how often i have seen it.  "To lie" is an intransitive verb.  That means it does not need to have an object.  Something or someone can simply "lie", such as in "Let sleeping dogs lie."  But "to lay" is transitive.  It needs a object.  You "lay" something on something else.  "I lay the book on the table."

You will be in company if you get these two wrong, but I refuse to say "good company".