Short, sweet, and to the point. Pick up any of our quick guides to get yourself in the know on any gardening topic. HTG Supply has read every book you see here, so you can trust that the information inside is not only factually accurate but useful for your indoor garden. Books are …excellent resource for gardeners, they have clear information without the need to sift through online guides. Shop now and pick up a quick guide on any one of many indoor gardening topics.