Mind and I don't sell or share it. There is no best book, it is like they all left out the best Chapter. You read many books, find small parts and test them, some you keep and rest maybe letter or never. Upper right is search, there been many posts started about this.
There are not many good books on day trading. They tend to become out of date very quickly. You should understand trader psychology and the importance of discipline and patience and handling losing periods. The classic books like Reminisces of a stock operator and Market Wizard series will help with these. To day trade futures you either buy and sell with the momentum/trend/breakouts. Or you buy at support and sell at resistance. Always cut your losses quickly. Patience and disciplined are key to day trading and you must not over trade otherwise the commissions will quickly start to pile up. 10 round turns with 10 lots = $400 a day or $100K a year just in commissions.
TTT, This is the resource section of ET... https://www.elitetrader.com/et/resources/ you might look in classifieds for people selling used books... https://www.elitetrader.com/et/forums/classifieds.36/ es