I enjoyed the Expanse novels through audiobook form, and overall like most of them. Book 4 was the least fun. So was season 4 which is basically covering the same plot 'span". The books aren’t for everyone and the style is maybe a bit utilitarian? They aren’t throwing high concepts or laboring over exquisite prose, it’s just what they are describing is damn interesting to someone like me.
Of course, I do think the books improved a bit since book 1; naturally as the authors get more experience with each-other and their story world, but also as they started on the show and that process seems to have informed the books for the better. They also genre hop a bit, in that each book is inspired by a different sort of story type. (Book 1 was a detective story - in space, book 4 was a western - in space, etc) so even if a specific book isn’t hitting, the next might have a better feel.
The show takes a lot of the book content and puts it into a more condensed form which usually helps the story IMO. The more extraneous and laborious book elements get slimmed down or done away with. And there’s no inner monologues or narration to bog us down with trying to explain the “coppery taste of fear” every 5 minutes.
To help things, prominent show characters usually show up earlier than they originally appear in the books (though sometimes they do the opposite.) Many small-time characters tend to have more interesting and developed show roles, while in some cases multiple minor characters get merged into fewer characters with expanded roles. Characters we hated in the books became fan favorites in the show through better characterization, more realized motives, and just the strength of the actors.
Nevertheless the plot deviation at a macro scale is relatively minor from the books. A lot of specific scenes and incidents and fan-favorite quotes do tend to show up sometimes verbatim. So it’s not a situation where they’ve deviated far. Season 5 is basically still covering the events of Book 5.
Bottom line, if someone read thru some or all of the books, the plot of the series is basically hitting those same major beats. If nothing about that first book was interesting at all, or it had serious and significant turn-offs, then it might suggest the show isn’t a good fit (but not necessarily so.) If the book premise seemed promising, just felt boring or maybe lacking on some fronts, maybe the detective story aspect wasn’t hitting, the show definitely does some of that different enough and better enough that it would be worth checking out, IMO.
That all said the next episode of Season 5 drops in a few hours and I’m super hype. I can’t even begin to get into why without just, s p o i l e r s, but there are roads ahead I’ve been looking forward to seeing characters go down for a long time. And some roads I have no idea where they lead but I’m ready.