I'm a graduate who decided to retrain as a conservator. All of my experience is within design, so I have never really done any science since school. I did study Chemistry at A Level and did so badly in my exams that my grade was Unclassified. So I'm sure you will appreciate, science is not my speciality.
This book however, is fantastic. Science is explained in terms of how it applies to conservation practice, rather than just the theory. I think this makes it much easier to understand. I've read all three of these books now and I have found them to be really useful. My understanding of Science (Chemistry in particular) has greatly improved which has supported me a lot within my studies.
I really can't recommend this book enough to other conservation students.