I have a book, small and covered in vinyl, that I use to ID the trees I do not already know. I can ID the usual, red and white oak because I make acorn flour, pines, sweet gum, American chestnut and most fruit trees. Everything else I must look up. The pictures you show make it hard for a novice to be certain. If you are using it for heat, ID would be important for it's heat generating properties. IDing for growing mushrooms would be important.