Once someone wants to draw on a higher level than scribbles, doodles, and badly done 2-d characters, they begin to look for instruction books - and learn many of them are useless. They kinda go "step 1, add these 3 lines. Step 2, add these 3 lines and look at the edges. Step 3, finish shading the complete picture - TADA, masterpiece!". This book forces you to do exercises on shapes, perspective, and all the classic exercises that a college classroom would give you (various still life, landscapes, portraits, etc). The information at first is very much read-then-draw, and it's a lot of cubes, cones, etc. Each chapter builds on the prior chapters. This is one of the best drawing instruction books out there, and if there was one book I would suggest everyone to start with before picking up the others, pick this up first. Once you've gone through this, both reading the pages AND doing the exercises, you will have the foundational knowledge of information (shape rules, perspective, light/shadow, etc) and workmanship (you will learn your strengths and areas you need to improve, which means you will be able to get the best use out of instruction - instead of "mister artist, help me draw" you can say "fellow artist, can you help me improve my use of sfumato to produce more realistic drawings? I can't get the technique quite right...".