well what do you wana know

the combined experience of everyone on this forum is much better than any book, i can tell you that!
well heres a low down on what you mentioned at the top!
HDR: High Dynamic Range - its a technique where you take (for example) one shot underexposed, one shot exposed as the meter shows it and one shot over exposed. You then combine them together in a final image which therefore has a MUCH greater dynamic lighting range. Thats not a great explaination.. but its the jist of it!
Panning: When you follow the subject with your camera in a smooth horozontal motion (usually anyway) and select a slightly slower shutter speed than usual... maybe 1/60 of a second in stead of 1/250... therefore the background becomes blurred, giving a sense of movement but the subject stays sharp due to you following it in a "panning" motion.
Shutter speed and aperture are essentially the two elements that determine how much light is let onto your camera's sensor for how long.
Shutter speed is measured in 10ths 100ths and 1000th of a second usually... and then into seconds when its a long exposure (for night landscapes for example).
So a fast shutter speed (to capture a footballer maybe) would hve to be about 1/500 of a second in order to totally freeze him - and get no blur.
A slow shutter speed of like 1/8 of a second might be needed to capture a darker a scene like a party. remember though that at this sort of speed, it becomes hard to hand hold it without blur. so either use a tripod or increase the ISO (which makes the sensor more sensative to light, and thus allows faster shutter speeds to be used... remember this increases noise in the photo though)
Aperture is the part of the camera that determines how much light gets into the camera. Confusingly, smaller numbers let in more light, and larger numbers let in less

Aperture is measured in "F-Stops"
SO for example an aperture of F/1.8 is a very large aperture and therefore lets in a lot of light. Whereas an aperture of F/22 is a small aperture and lets in a small amount of light!
Aperture (along with things like distance from subject) effect a thing called "DEPTH OF FIELD". A large DOF is obtainted by using a small aperture (like F/22) so in a shot taken at F/22, most of the secene will be pin sharp... great for lanscapes etc.
In comparision, if you wanted to get shallow DOF, you would use a large aperture like F/1.8 or F/3.5 or something. This would result in the subject in focus comeing out pin sharp, but the background (and sometimes bits of the foreground) drifting into a pleasing blur.. a nice technique for isolating a subject for a portrait.
theres a start lol.... hope it kinda helps... you may well allready know alot of it
Dave