The book is, Exploring Candle Magick: Candle Spells, Charms, Rituals, And Divinations by Patricia Telesco.
Exploring Candle Magick is pretty much a book geared toward Wiccans and their idea or version of candle burning magic. It is a rough basic guide. Practitioners who are already knowledgeable on candle workings will not take much from this book but may recognize several key errors or points of conflict with regard to the practices described in the book. On a positive note, the book would be good for a beginner and someone who has no knowledge or experience with working with candles. The negative aspects of the book include teachings that contradict established candle working lore, such as to reuse wax from candles used in spellwork (should not be done) and that one merely blows out the candles in between use (candles should be pinched out, to blow a candle out dissipates the energy). I personally was turned off by the book because it was dedicated solely to Wiccans and did not encompass other and older magical traditions from which Wiccans have borrowed heavily their concepts and practices of magic. The incantations, spells, and chants included in the book are infantile and borderline trite. I will end on a positive note as at least I did take away something interesting from the book, that one can use lemon water to cleanse candles. I thought that was interesting, but as far as actually adding that to my practice I would think it would cause the candles to become sticky. I may try it once though just to find out.
On a scale of 1 to 10, with 1 being the lowest and 10 being the highest, I give this book a 4. I would have rated the book a 5 if the author had delved into other types of candles, such as image candles and 7 day glass candles. Instead there is only a very brief mention of Adam candles and Eve candles. The book itself primarily focuses only on taper and pillar candles.