The book is absolutely great, giving me a spectacular vista of the diversity systematically. The whole series are wonderful and a must get. However, there are some bugs, one of which is the interaction of the evolution tree about prokaryotic and the one about protists. The clades just missing, and I don't know how to get them out. Please fix. Thank you.

I had no trouble downloading Books 1-5 but couldn’t download this one. Here’s what I did to get it: In iTunes, I clicked the little “v” arrow next to “Download” and I copied the link. I went back to my web browser and pasted it into the URL space. It brought me to a web page where I could click a “View in iBooks” button instead of “Download” button. After I chose to view it in iBooks, I got a screen in *iBooks* not in *iTunes* and once I clicked “Download” on that screen the download began and worked perfectly. I had to do the same for Book 7.

always failed to download after downloading full amount of the file size. i’m sure the book is great.

This series is well thought out, engaging, and perfect as a foundation for our homeschooled teen. Thank you!