MARIJUANA GARDEN SAVER a hand book for healthy plants this book is amazing from nute def.,to pests, disease ph , environmental stresses, lighting and a whole lot more for around 20 bucks to have something this great is worth every penny its all here [well mostly] edited by ed rosenthal the pics are clear and well defined easy to understand and read and make sense of what there talking about found it at the local book store pick it up its great[ and no i dont work for a book store ]or any one for that matter lmao check it out youll be glad you did!