The first two books in this series are goofy, have a lot of annoying elements, and aren't exactly well-written, but in spite of that I quite enjoyed them because the relationships were charming enough despite the inherent weird dubcon element of the whole "hey so I might've mpreg'd you" thing (at least with Zeus, Poseidon was actually a decent guy). This one still has all of the bad aspects and then on top of that the "relationship" (insofar as they have one, at least the other couples went on dates) is godawful.
Hades is an asshole. Just a total piece of shit, both in general and during sex. The sex scenes in this one are loveless, violent and degrading - the first one is literally an assault in public with choking (choking is never safe, kids!) There's zero bond between the characters, negotiation, proper discussion, safety or care or anything like that, with Gideon putting up with it because he likes "rough sex" and is down to go around in horrible pain for days after... I wonder how many people who get on Fifty Shades of Grey's case for being a bad and harmful representation of kink endorse books like this when it comes to m/m? We don't get one single sex scene where Hades treats Gideon well or even a scene where he does anything remotely nice or romantic for him ever (this guy does NOT reciprocate oral). The end of the book is bizarre as it seems to be implying that Hades will be better and actually start treating Gideon with respect and love but, as they say, show don't tell, and nothing is shown, and it's impossible to even imagine because there's nothing to base a potential "nice" version of their relationship or of Hades on because there have been zero positive interactions so far and it's like the author's just bored of them now that they're actually together. One can only assume they're still going to have horrifically bad "BDSM etiquette" or whatever the kinksters call it, since it implies that Hades gets off on abusing and "breaking" Gideon and I doubt he'll magically change. Oh, and this will all be happening with a pregnancy and then with a child, lovely! I also thought it was really sad how their mutual interest in old books, history, restoration and such is barely discussed between them except when Hades wants to mock and goad Gideon about his beliefs about the afterlife or whatever; it should be the whole crux of their relationship, the way theater or the ocean was with the first two couples, but it barely matters because Hades doesn't really care about Gideon's mind or interests, or even his physical wellbeing, and just treats him like a toy.
Ugggh, there's just so much potential with misanthropic asshole characters who turn out to be caring and attentive in bed (or against a bookshelf, whatever), and Hades in mythology is pretty much a poster guy for "scary but secretly tender" but instead C.J. Vincent instead wrote this abomination. It's so jarring to go from the cutesiness of the first books to this too, why are they in the same series?
Anyway, to get back to the plot: Hades, despite not being sure Gideon is his "spark" or whatever and if his magic seed (lmao) will kill him, takes off the condom during sex without Gideon's permission because "he felt love but also an urge to destroy him" (not an exact quote but WHAT that's horrifying) and Gideon's response to this is to have one line of dialogue where he's mildly annoyed - he doesn't know about the hellseed of course but he asked him to wear condom for normal, human reasons - and then this blatant violation and breach of consent is never mentioned again??? Holy shit.
Then Gideon gets pregnant from this, which is something Hades knew would most likely happen, and that he'd be in danger both from the pregnancy and the vengeful goddesses..... and he just leaves him, when he's the one who's been lecturing his brothers about the danger the past two books??? And even mocks and violently assaults him when Gideon encounters him at the library and calls him an asshole for abandoning him after sex??? And then he abandons him again and Gideon is actually killed by the goddesses - which creates a huge plothole by the way because if the Sparks and the unborn children can be so easily revived with zero consequences or trauma then there's no tension to the peril they're in - who Hades KNEW were after him because he literally saw Eris. And then he gets Gideon from the Styx (in a sequence that feels suspiciously reminiscent of Disney's Hercules) and Shade Gideon can't be brought back unless Hades apologises and HADES IS ACTUALLY RELUCTANT TO APOLOGISE AND TRIES TO GET OUT OF IT??? And then Hades is all like "oops sorry you died guess you're stuck with me now" so Gideon didn't even get to make a choice and they get off scott free from actually having to, like, have a conversation or mutual understanding or anything other than them still being at, like, square two of their extremely toxic relationship.
The relationships from the past books were pretty shallow as well but this one is by far the worst due to, as I have mentioned countless times, the complete lack of affection, tenderness or respect, and the fact that Hades seems to be pretty much a sociopath where the author just tags on a very unconvincing "oh yeah he totally cares about and loves Gideon don't worry" ending. Anyway, at least Gideon is apparently mad with him but since the book just ends after this, and he realises that Hades has a cool library, he's probably over it already; Gideon is one of those characters we get told is fiery when they're actually just a pushover who lets the so-called love interest treat them like crap. In my wildest dreams he stays pissed and subsequent books have him and Persephone team up to murder Hades but if they do I won't ever know because I think I'm done with this series after this abomination.
As an aside here since I didn't review any other books: this series is hilariously misogynistic. Usually m/m books have some female cheerleader type characters that the author throws in to be like "see I'm not like those fanfiction authors from back in the day who made all the women in their yaoi fics evil, look at this nice girl pointless side character!" and this series had a couple of those in the first book, but in addition to that it also has a bunch of insanely over-the-top annoying female characters (even the cheerleader-character sister from the first book was written like an annoying teenage girl despite being a working single mother) and on top of that every single goddess/nymph that's shown up or been mentioned thus far, no matter their dominion or role or relationships in Greek mythology, is an evil bitch whose sole purpose in life is to ruin the gods' love lives. Why is Eris siding with the wronged goddesses instead of being a chaotic neutral party? Because WAHMAN I guess. Then of course there's the fact that the entire premise of this series is that all the goddesses in the Olympian pantheon are being replaced by mpreg twinks who are going to make a better, cooler Olympus and turn the gods into devoted, loving husbands when none of the goddesses ever could lmao.
Actually, thinking about this highlights another issue with By the Book specifically, in that we're supposed to root for the gods in this series because even though they were terrible, selfish lovers in the past they've changed their ways and are going to prove themselves worthy of their mates now... and then in this book Hades is a POS who treats his Spark like trash, what an utter fail of a character. Oh, and apparently part of what made Persephone a bad wife is that she likes tenderness and a partner who actually gives a damn about her comfort, but thankfully now poor ol' Hades has found someone who will put up with all his abuse and is down to choke on his **** while Hades stares out across the city drinking wine and disinterestedly listening to the sounds of the choking (yes, this is an actual sex scene that happens in the book). Disgusting. The fact that this seems to be one of the better-liked of the series makes me so sad.
... Oof, I did not expect to have so much to say about this trash, I am absolutely not editing this for grammar or anything so you're a trooper if you read the whole thing.