On the video tutorial LRTimelapse 4 you explain the keyframe editing with the use of CTRL key to edit the keyframes. In your newly edited e-book you use the term Shift-key . This is very confusing.... Also in the book the explanation is different....ie.....( in a 3keyframe edit) you edit the 1st keyframe.......then go to the last keyframe .......then back to second. It is not explained this way in the video....thanks

It's basically quite the same. Shift-Click selects a range, Ctrl. Click adds certain keyframes to the selection. It's like in Explorer or Finder too. This is basic operating system stuff.
It's up to you, if you first bring the editing of the first keyframe to the next (ctrl click the next), modify that keyframe and then bring the modified settings to the last - or if you bring the settings of the first keyframe to all the other keyfeames (shift click on the last) and then do the editing of the second etc.