Am I Actually the Strongest? novel volume 6 was written by Sai Sumimori with illustrations by Ai Takahashi.

To be reincarnated into another world with the promise of a “cheat” power is one thing… but to be reborn as a baby, and then left for dead after your royal parents think you're powerless?? That's another thing entirely! Now the newly-born Reinhart - or Hart to his new friends - must find his way through a dangerous world… but luckily he's got magic that's quite literally off the charts! Watch Hart level up as he grows up in this latest volume!