Best Ontario Guidebook

Alexandropoulos Ontario Climbing Vol 1+2 link
Wong Ontario Rock Climbing link

Does anyone have both of these? Which one is better? I'm only interested in Mt Nemo, Swamp, Metcalfe, and Devil's Glen.

There are pros and cons to both.  Unfortunately, the biggest con against Wong's effort is that it is "derivative" if one takes a kindly view, and "plagiarized" if one is less inclined to be charitable.

Check on ontarioclimbing.com for opinions and beta

Wongs has more pictures and bolt counts are included. Gus book is good if you are into trad, more trad routes included and history of them