I came across doodle books by the way of online recommendations. I’m always interested in books that teaches art at book stores, and I’ve always love to watch art tutorials on youtube.
Yet it is clear that you cannot improve if you don’t start drawing things yourself. Videos and books can teach you techniques of give you an idea of how to draw certain shapes, but to learn art, the best way is to pick up a pen and paper and start drawing.
This is why I’m beginning my pursuit of drawing people through a series of exercise as guided by this book I found: Easy Drawing Note, 10 minute a day, learn to draw people.