interesting book. some chapters were better than others. I found it much more useful as a reference and conversation piece than having to read it cover to cover.
This is an excellent book for instructional design. It was written in 2009 so it is a bit outdated, but still worth reading for a great overview on educational theory and design. Each chapter is written by a different author and the last chapter helps making sense of the volume holistically. To readers who plan to read only selected chapters, I would recommend reading also the last chapter to understand, in Reigeluth's words the philosophy of the book and our instructional times.
At first I borrowed this book from my professor and thus resisted the urge to highlight it to death. But, after I started reading the third chapter - Merrill's Principles - it became obvious that I needed my own copy. My book is now so filled with highlights and notes that I could never sell it. I have no intentions of selling this book, on the contrary, I am looking forward to Volume IV, which is being written. Perhaps, the only negative side about having a fourth volume will be that we will not be able to call this set "the trilogy" anymore.