Forum:Spirit reaper, indestructible?

My friend and me were playing a match, when we stumbled upon something. there are a few things we want to know.

1. if i have a face-up spirit reaper, and my opponent summons elemental hero gaia, he activates his effect targeting spirit reaper, and then i chain my face-down book of moon, targeting my spirit reaper, is spirit reaper then still destroyed, and does gaia gain half my spirit reaper's atk?

2. if i have a face-up spirit reaper, and my opponent uses compulsory evacuation device, targeting my spirit reaper, is spirit reaper destroyed? or does it just go to my hand. is it the samething as with zephiros the elite? bouncing my spirit reaper for its summon.

can you make us clear on this?