I would give this book a 3.5 if I could.
This is an information-packed book for those curious about healing herbs. On a general level, the information is easily digested, and gives a nice run through of the appearance of the plant (no pictures), a brief history of the plant in different cultures, and its medicinal uses, followed by a section titled "dosage", as well as warnings about using the herbs during pregnancy, or while on specific medication, if such warnings apply.
However, as someone who was raised by a family that uses natural remedies, and makes their own tinctures, teas and poultices, there are two omissions that cause me to deduct points. The scientific names of plants are missing, which may, especially with colloquial names, confuse someone interested in using the plant to accidentally expose themselves to a toxic cousin by a similar name or description.
The other omission is that when talking about dosages of the actual plant matter, the author is vague. For example "Take two (2) to three (3) capsules two (2) times each day with water at meal times". would be a common piece of instruction. Clearly, the book omits any information about herbal preparations that are not manufactured for sale. I did not spot a mention of that in the book's description. Even then, dosage instructions do not talk of the concentration within the capsules, which matters greatly. Taking 3 capsules of a more concentrated preparation without one's knowledge may in fact create risks of complication or toxic side effects.
So although I really appreciate the book, with me being interested in learning more about plants I can grow or forage for use in teas or tinctures, or for topical applications, to find out relevant information about the plants in question, I will have to research each plant separately elsewhere, and cannot rely solely on this book.
What this book is great for, is a starting point for further research. I can look up a condition and suggested treatments, and work my way up from there, or look up a plant from the table of contents. At its price ($2.99), despite its shortcomings, I would still most definitely recommend this book to others.