As always, Rick Riordan's book always based on a mythology (since he's the expert of it) the Heroes of Olympus (We will call it HoO from now since it's too long!) not only included Greek Mythology but also Roman Mythology. This would need you a bit will power to understand that each god in Greek got their name in Roman mythology, yet their characters are a bit different if you compare in Greek's or in Roman's which kind of a bit confusing at first, but well.. you'll understand it as you read it on and on.

The Kane Chronicles in other side is based on Egyptian Mythology (as i explained before) which include a lot of symbol that they called as hieroglyphs which is kind of the language for Egyptian in the book, which is new, because i don't think i find roman's or Greek's language in HoO or PJO that much in comparison with this book. 

Personally i really like the Kane Chronicle's format, which is based on recording form Carter and Sadie's POV of the even in the book. I found it really refreshing since PJO and HoO is just like the regular book you might found, Kane got some perks for me for the writing format because i really like their bickering in the background while they take turns to tell their story.

Plots

 The first book of the series always become the base story in the whole series, in HoO we got two books as the base foundation of the whole series. The Lost Hero (first book) is based on Jason's story a roman half-blood, being found in the middle of half camp blood. The second book we got the Percy's side of story for being a greek demigod in middle of Roman Half Blood Camp. Both of them of course having a quest to complete, with the help of Hera (who is the one who switch them both in each camp and erasing their memory at that time).

In Kane series we got the Red Pyramid as the foundation, explaining a lot about Egyptian Mythology, the magic in it, of course you will feel a bit frustrating because we are going along with the main characters here who got no knowledge of who are they, and why they're being treated like that, while whole people knows the truth of their identity. 

Of course each book has their own small quests (which can't call it small since you are fighting against titans and god) and the last book is the main quest for the whole series which in HoO you fight the Gaea herself and her minions (the titans i means) and in Kane Chronicles they fight the Apophis and the rebellions.  

Character Development

We got a lot of characters in HoO, which also made the POVs of the book become multiple, and somehow some people hate this multiple POV but i think i like it. Of course i got my own favorites in term of how they narrate the story, but in this HoO, we find the differences between the child of Roman gods and the Greek's one. Roman raised like a soldier with so much strict manner, while Greek's are just more easy going, just like American. 

We can see how Annabeth grows in this book, specially in the Mark of Athena, and each character takes turns to shine in this whole series. I'd say, i love the development for the Percy-Annabeth Couple specially in the fourth book the House of Hades, and the last book, Leo shines the most, even more than Percy for me. Of course the others feels like sidekick in a glance, but believe me, they got turns to shine, although in my opinion some of them outshines the others because they got more parts in the story.

 The Kane Chronicles in other hand only took 2 povs which is Carter and Sadie. I would say i like Sadie's sassy-ness, but i like Carter a lot more. I think he acts as his age, while sadie for being 12 year old just speaks like 18 or even 19 y.o to me. Sadie always got the most important part in the whole series, since she's hosting Isis, the goddess of magic, she can use spell, read spell, which is include most of part of the quest, while Carter got the power of Horus, who made him able to fight with the help of Horus's strenght.

Carter's pov mostly dominated by how much he got persuaded by Horus to take control the body, or giving the power together to rule the world. Which i find it's not the case for Isis and Sadie. And i think he's just cute and helplessly in love. A romantic one. 

We also got crazy character in each series, which i find it amusing. First we got Octavian the Augur of Camp Jupiter, who so obsessed to become Praetor, leading Jupiter camp to war against Greek demigods with working hand in hand (in his term, controlled) with monsters. Oh spoilers, it ends tragically. 

The Kane Series we got Setne, the ghost magician who appeared since the second book of the series. He's just too smart which outsmart  Osiris for decades to lessen his punishments also killed his watcher several times already. 

Both of that characters took a great role in each series which of course people hate them in some point but yeah, crazy people always a fun character to read.

Loveline

Like i said, the love is in the air in this whole HoO series, specially the fourth and the last one. I personally love Leo's one if we can put aside the great love from Percy for Annabeth and vice versa in the fourth book : The House of Hades.  

In Kane Chronicles we got Carter who in love with Zia, which become complicated because the one he loves end up just a shabti (an enchanted clay) and building her feeling toward Carter after he rescued her from the sleeping beauty spell just felt so frustrating. Sadie in other hand, batting her eyelids for two man, Anubis the god of death and Walt who is dying by the curse from his ancestor, king Tut.

I would say i love Carter's love story than Sadie which is a whole different kind of love, believe me the last book just blows my mind with the idea of her loveline. 

Overall

I also like how Sadie and Walt go against goddess Neith the hunt goddess in order to find Bes's shadow, the dwarf god. I found the scene was so fun to read, specially with the jelly babies part. And thank God, Carter got his part in the last battle! 

My Verdict

Heroes of Olympus Win!

I mean, it's easy to choose since i got my fave book in the series in this series which is the second, third and for sure the fourth book of this series. I think this took a whole new level for Percy Jackson series. I like Carter but i think he lacks of spotlight while Sadie took it all in most part, he just become the chicken god, with clumsiness, although he's the walking Egyptian Encyclopedia, he just kind of stupid in fighting plans i think. And the last war is just not enough to outshine the war in Tartarus (even the last war in the last book can't outshine the fourth book's war for me). 

And yes i find the HoO gave me more reading rush than Kane Chronicles. I mean it's a good book, just not "hook" enough for me. 

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