There is knitting machine called Shima Seiki which is way easier and more convenient than hand knitting.
A machine isn't the same as hand knitting. Hand knitting takes a lot of practice, patience, and time. It's relaxing and the work created holds a lot of meaning. 
How do you learn to knit faster?
There a ton of books, but videos would be the best way to learn. Once you get the hang of it though, it's like riding a bike! You could knit while watching tv, not even looking at your hands. 
What are the best selling books for knitting?
Boye Beginners Teach Yourself Knitting Set is a great option because it comes with the book and supplies needed to start. 
Amazon has great selling books for knitting.
They do! I believe they sell the one I mentioned. 
There is a book called my first knitting book which is for kids to learn on Amazon.
That would be great for my grandkids! They're always asking me to help them learn to knit. 
There is a website called favecrafts com that has everything related knitting for kids.