The link to download the source code for Volume 3 app examples is in the e-book on page 2 (the “Copyrights” page).
In Volume 3, First edition “A” (see page 2 of the e-book for the version), incorrect images of blocks code were inadvertently inserted for the ListItem blocks in Chapter 3. The last two blocks code images in chapter 3 and should be replaced with:
Also in chapter 3, at the end of the “Blocks Code: Delete” section, there was a 2nd code sample image that is not needed. This code sample may be ignored.