31 books • 2 series
Book #3: The Time Tunnel
Book #7: The Time Tunnel - Revenge of Gods
Book #7: O T�nel Do Tempo - Vingan�a DOS Deuses
Book #8: O T�nel Do Tempo - O Massacre
Book #8: The Time Tunnel - The Massacre
Book #11: The Time Tunnel - Secret Weapon
Book #12: The Time Tunnel - The Death Trap
Book #13: The Time Tunnel - The Alamo
Book #15: The Time Tunnel - Invasion