Hi Handyman welcome to the forum,
Unless they have improved it since the last time I saw one the 3612 has a non locking power switch so if you wanted to use it in a table you would have to start taping the switch up
, also has a pretty poor depth stop arrangement. Like coggy I have the DW625EK and can't fault it and would buy another tomorrow if it packed up.
I use a DeWalt 2000 router table which is lightweight and portable if I wanted one just for the workshop I would look for something with a bit more mass.
As for books, I haven't found books so usefull with power tools, Axminster sell DVDs and videos; I would think they would be more help.
Keith