Learn English – Ticket got created and ticket is created

If you are talking about the past you should say

I got to know that it was a self-help book.

even if the book still exists, because you are referring to something that happened to you in the past ("getting to know" or further back when you read the book) you should use "was".

If you are talking generally about something that still exists then you will use "is"

I read a book called "Teach Yourself English", I got to know it is a self-help book.

Some answers have already been given to this question, I will try to phrase it differently, I hope that helps.

Gordon was about to walk away from the Impala when he saw it stop and (saw) his son get out.

This sentence is correct. As already mentioned, the past tense is "saw". The man saw something. What did he see? Two things:

1) He saw the car stop.

2) He saw his son get out.

That means he observed those two actions from start to finish.

Now if "saw" is the past tense, what form are "stop" and "get out"? This is what I call "a bare infinitive", you can call it "an unmarked infinitive", it is the infinitive of the verb without "to". As mentioned before, verbs of perception (hear, listen, see, etc.) take a bare infinitive:

I heard him slam the door.
I watched them grow.

It is possible to say "got out",

He saw it stop, and his son got out.

but the sentence will have a different meaning: what he saw was the stopping of the car; after that was completed, his son got out. But we are not talking about what he saw in the second part, we are talking about the action of the son getting out, and the sentence sounds a bit clumsy to me without "then" after "and".

You could also say something like

He saw it stopped in the middle of the road.

Then it means that he did not see the action of stopping, when he saw the car it was in the middle of the road and it was not moving.