After my first offering of Differential Equations using my book, there were of course plenty of corrections and additions I wanted to make. I thought I'd draw your attention to it.
. . . The biggest change is that the book integrates both Maxima and SageMath, and the reader can use either one.
In other news, Bergeron notes:
I've also created a Calc II book that is a mash of Guichard and Mooculus. . . . I'm just about ready to go public with it. By the time I teach Calc II next Spring, I'm hoping to augment this book to provide Maxima and SageMath integration in a manner similar to the DiffEq book.
According to Bergeron, of particular interest to potential adopters is the fact that "there is a tiny bit of Linear Algebra in my Calculus II course, because my college doesn't have a Linear Algebra course and I'm trying to make my Differential Equations course a little more interesting by splitting the prerequisite LinAlg content between Calc II and DiffEq." That's certainly a departure from traditional second term calculus content. I'd be interested in hearing from folks that have tried that.
Many of us are considering adoptions for spring classes right now. Take a look at these. I'm definitely going to take a close look at the differential equations text the next time I teach that class.