Never Highlight a Book Again! Just the FACTS101 study guides give the student the textbook outlines, highlights, practice quizzes and optional access to the full practice tests for their textbook.E-study Guide For: Precalculus By Michael Sullivan, Isbn 9780321716835: Mathematics, Precalculus available on March 06 2016 from VitalSource for itemprop="offers" target="_external" title="" itemscope itemtype="http://schema.org/Offer">8.95