Please note that the images are copyright protected and can only be used for educational and training purposes. Use an A4 sketchbook and always jot down the date of your drawing and take notes. Do each task regardless of agreeing with the subject, this will not only teach you to push through problems but you will discover in time that you make a pleasing drawing from almost any subject. Or if you have already something planned for the day to use as a motif that suits you, the better. Never be overwhelmed by a subject that seems far too intricate for 10 minutes a day, all images are just indicative. So do what you can and leave the drawing unfinished and whenever you feel like it go back to it.
A small amount of images from the following books have been used, which I recommend as the best source for this drawing challenge. You can order most of them Online. If you want to buy only one book, I advice to get "The Art of Basic Drawing" by William F. Powell.