rambler,
The ATP involves three papers,the SARON,
SAMRA and the INRAT.
The Aero course study books are good but you will need to do a lot of study on Met from
elsewhere,two out of three papers concentrate
on decoding of TAFs and prog charts and stuff
and the Aerocourse do not cover enough.
Another important requirement is that you will HAVE to have a Canadian medical cerificate to do these exams,even if you have done the medical but have not got your cert yet they will not permit you to write the exams.
The cost for all three is Can$245/=
Hope this was of some help.