<p>The textbook list for math 175 list both the math 175 and 155 textbooks with a notation "go to class first." The math 175 solution manual is listed with no notation. We would like to sell the math 155 book and shop online for a low price on the math 175 book. The lowest price used books go fast and take some time for delivery. What is the reason for the "go to class first" note? Is it a mistake to just go ahead and buy them?</p>
<p>yup. when I put a come to class first note on a text book order it means students need to understand before purchasing them how I’m going to use them and to what extent. This might mean that they might not wish to spend the bookstore price on them because they’re available cheaply among their peers because I’ve been using that textbook for 15 years. I suggest you reach out to the teacher of the course and find out what’s up. Might save you a hundred bucks. carpe diem.</p>
<p>I believe it’s notated that way because the 175 book is actually inside the 155 book. It’s the second half of the book. It can also be purchased separately.</p>
<p>It may be the professor has some additional information about book purchasing that the bookstore system doesn’t allow them to enter. The bookstore systems are pretty specific and usually require specifying the edition. Each year DH emails his registered students when the book lists post to let them know that, even though he put a specific edition in the online store (because he had to), students can actually purchase any of the last 4 or 5 editions, and should buy whatever they can get at the best price. I wish D’s professors did that!</p>
<p>I went to my classes before purchasing books. On the first day, my biology professor told us we were probably never going to use the book. I bought it anyway just in case, and have opened it once. My sociology professor completely changed all the books from what she had online, so everyone who bought in advance had to return them and exchange for the right ones. 
IDK, just my strategy is see how it goes.</p>