The basis of this particular book is highlighting the infrastructure of applied precalculus topics for evaluation and analysis. The writing is both fluid and appealing to me personally. I genuinely like the text for it's completeness and accuracy. The two have written another fine work about an interesting topic, and have both influenced me personally to move on to my Calculus text as well. I studied both at the University level, and I must say both were challenging to me, for good reason. For that, I am grateful to have passed both, and I have two degrees to show for it as well. Fine building text to other things academic, perhaps.