Hi Nasseem,
Sorta / Kinda - From a technical / overview perspective, N K Guy
has written a "bible" of Canon EOS flash photography, so it's a good place to start, from a more "look what can be done" with a flash, one of the very best is Joe McNally's
Hot Shoe Diaries, although be aware that it's using Nikon equipment (same principles as Canon, just relatively minor operational differences).
For a more "holistic" approach, there are many videos on
Kelby Training (including several from Joe McNally) - this is by far far far the best value ($24.95 per month) (Just try it for a month!).
From a out-and-out technical perspective there's also some guy named Colin Southern over at CiC! (Seriously, there's not much I don't know about the technical side of them).