The next book after Sonic the Hedgehog, Vol. 14: Overpowered appears to be Sonic the Hedgehog, Vol. 15 in IDW’s graphic novel line, but the exact subtitle was not shown in the source I found. The volume listing for Overpowered confirms it is Volume 14 and points to the ongoing IDW series continuation.

What I found

  • Overpowered = Volume 14 of the IDW Sonic graphic novel series.
  • The series continues beyond that volume, but the source snippet available here does not clearly show the title of the next collected book.
  • If you meant the next issue/story arc rather than the next collected volume, that would depend on where you are in the comic reading order.

Best guess

  • The most likely “next book” is the next IDW Sonic volume after Overpowered , i.e. Volume 15.

Would you like the reading order after Overpowered or just the next collected volume title?