The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

So he just happened
to stumble upon a BOOK
The Big Bang Theory Season 12, Episode 17

Sheldon threw his back out
handing him that BOOK.
The Big Bang Theory Season 5, Episode 5

so sweet that Stuart and I
turned it into a BOOK.
The Big Bang Theory Season 12, Episode 18

A BOOK every king should read.
Game of Thrones Season 4, Episode 2

Enjoying your BOOK?
The Big Bang Theory Season 12, Episode 3