I havent read the whole HP Series ever since following along when books 4, 5, 6 and 7 were released. That was some time ago!:-) 
 So it is really fun to revisit the world of wizards, Hogwarts and the fight against You-know-who. 
 The third book is still relatively harmless. I enjoyed being in the Hogwarts world with Harry and his friends and experiencing School life with classes, Quidditch and Holidays with them. 
 (view spoiler)[ This book is a bit slow paced but I enjoyed the mystery of the black dog and what it might imply for Harry. Also him learning to conjure a patronus and fight against the dementors is of course needed for the future. I loved when he finally learned the truth about Sirius Black and then to follow their first bonding.:-) (view spoiler)[ (hide spoiler)] (hide spoiler)]