Complex sentence: During his time in prison, Breslin has analyzed every high security prison and gained significant survival skills, but faces his biggest challenge in trying to break out of an ultimate high-tech prison that he himself designed to be escape-proof.
Split into simpler sentences: During his time in prison, Breslin has analyzed every high security prison and gained lots of survival skills. But Breslin faces his biggest challenge yet, breaking out of the ultimate high tech prison which he designed to be escape-proof.