Hey guys

I'm planning to buy a white lions cardset from David Blaine.
The only problem is that i looked everywhere for the full explanation for the marked system but only found that you can know the value of the card by the thin edge of the half spades.
So by this technique you can know if its a K,Q,J, (10 or 6), (9 or 5), (8 or 4), (7 or 3) ,2.
Is there also a techinque to know the suit of the card? (spades, clubs, diamons, hearts).
And can someone maybe be 100 procent sure wich number a card is instead of only 50 procent?
Sorry if the answers already have been posted but i looked everywhere on the forum and never found a clear answer.

Kind regards