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any tips on changing spark plugs in my 2005 civic hybrid. the best repair manual, installation tips etc...

I've pull out the plugs on our '06 (all eight) and had a look at them, at around 65000 km, not sure how this equates to first gen plugs, but anyway:

Things you'll need:

Dedicated (3/8" drive) 5/8" spark plug socket, a purpose-built long socket with a rubber grommet inside, to grip the plug when extracting from the deeply recessed well. At least, I think you'll need that size, double check before you get started. Your dealership would be able to tell you.

Several extensions, say a 3" and 6", in 3/8" size, and obviously a 3/8" ratcheting drive wrench.

Also, a torque wrench. Likely 1/2" drive with 1/2" to 3/8" adapter. Micrometer style are better. The torque spec. (for '06 fwiw): 13 ft/lb

Anti-seize compound: an oil-molybenum blend (I think). You apply a slight amount to the plug threads upon re-insertion.

Carbueretor cleaner. If your plugs are like the '06, this is all you should use to clean the plug, maybe a dunk in the stuff and a wipe with a flannel rag. Do not use abrasives, the plug has fragile coating.

Gap checker. The wire gage type are good. I also have a circular ramp type that works pretty good.

Compressed air: whatever you've got. A bulb blower is better than nothing, a hair dryer, heat-and-strip gun (don't get too close), a vacuum with blow function, or proper air compressor if you have it.

Tips:

Again, if per the '06, do not attempt to adjust the gap, just check it. If out of spec, get new.

When removing the plugs, once you've pulled the boots off blow out the cavity with compressed air, then once you've loosen the plug a turn or two repeat the exercise. Even though it's theoretically capped, stuff does get in there, and the more you can blow out the better.

Try to be organized when laying out the removed plugs, note which cylinder they're from, and don't mix them up. If any look burnt, oil foiled etc, it helps to know which cylinder they're from.

Be careful when handling the plugs, especially over concrete floors. You do not want to drop them.

Books? Number one choice, the Honda Service Manual. Look in the back of your owners manual, there might be info on how to order, if it's like the '06. It will set you back close to $100. Worth it: if for example you were do your own plugs once. Check your valve clearance and it's more than payed for itself, again.

Anyway, and this applies to '06, the plugs are quite expensive, and considered long-life. When I checked ours they looked more-or-less brand new still, at 65000 km.