Transformers Prime : Broken Silence
Read book one Transformers Prime : the silent ones before this one
SoundWave killed his only sister to pleas Megatron and get the gem from her who works with the Autobots.
Optimus loves ThunderWave, but think she is gone forever and wants Vengeance on SoundWave.
ThunderWave the sister of SoundWave who is declared offline, but somehow came back to life with no explanation...
What will become of these 3 read to find out