Hello Amy,
Leaving you a quick message since your computer was crashing on you. You can find a relative who entered Canada from overseas by looking at a specfic microfilm #T-14966 from the National Archives of Canada. Just ask your local library about getting an interlibrary loan for it. You may be lucky I can't see there being too many Bookless listed between 1919-1924.
I know you will be able to find them this way. My grandfather came over to Canada from England in 1924 and his record was listed in the microfilm reels. If you don't find a record Citizenship and Immigration may be able to find it if you can't.
Happy hunting,
Jeff