Chapter 7, Page 170 – Code for HandleTrigger5 Change
Chapter 10, Page 265, 2nd paragraph
Should be “When you install an unmanaged package, …”
Chapter 11, Page 296 – Section “Avoid External ID and Rollup summary Fields on Stand-ard Objects” Change:
There is an organization limit of no more than three external ID fields
There is an organization limit of no more than seven external ID fields
Special thanks to Peter Churchill for reporting these!