Beast Quest Series by Adam Blade
Sepron the Sea King, Ferno the Fire Dragon, Nanook the Snow Monster
How to Train Your Dragon Series by Cressida Cowell
How to Train Your Dragon, How to be a Pirate, How to Speak Dragonese, How to Twist a Dragon’s Tale
Astrosaurs Series by Steve Cole
Day of the Dino-Droids, Skies of Fear, Deadly Drama
Boyface Series by James Campbell
Boyface and the Quantum Chromatic Disruption Machine, Boyface and the Tartan Badger, Boyface and the Uncertain Ponies, Boyface and the Power of Three and a Bit
Dinosaur Cove Series by Rex Stone
Attack of the Lizard King, Charge of the Three Horned Monster, March of the Armoured Beasts, etc
More challenging books for Years 6 and onwards:
Spook’s Series by Joseph Delaney
The Spook’s Apprentice, The Spook’s Curse, The Spook’s Secret, The Spook’s Battle, The Spook’s Mistake, The Spook’s Nightmare, The Spook’s Destiny, I am Grimalkin, Spook’s Blood, Slither’s Tale
Skulduggery Pleasant Series by Derek Landy
Skulduggery Pleasant, Playing With Fire, The Faceless Ones, Dark Days, Mortal Coil, Death Bringer, Kingdom of the Wicked