Wow the ending information was just so hard to wrap my mind around. I also can't believe what happened to Dan both during the jump and after. This book was just a whirlwind of emotions. This was my favorite time jump as the 300 is one of my favorite times. I can't wait to see what Dan ends up doing with the information gained as well as how he will handle the time jumps next.

I've said it before about this series, but I'll say it again—this book and series is something I would have loved to have when I was younger. I'm a big fan of Greek history so this was my favorite entry so far. The dialogue is well-written and doesn't feel like it's trying to force “teen speak.” It builds well on the pre-established conflict from the first three books. And the twists! They just keep coming. There were so many tense moments in this book. Can't wait for the next one to see what Dan makes of them. Another great entry in the series.

I received an ARC through NetGalley from the publisher in exchange for an honest review.

5 Stars! I really love this series! This is book 4 in ‘A Jump in Time’ series & it could be a standalone but would be better off being read in order. It’s been a minute since I read book 3, but luckily the author gives info that jog the memory. If you enjoyed the movie ‘300’, this is a book to read. I feel smarter having read this book and it didn’t bore the heck out of me like most history books do. A lot is fictional but it also has many historical facts that are interesting to read about. Did you know Spartan boys were sent away to basically a military school at the age of 7? Entertaining, wonderful main characters, funny at parts, tragic at times, unpredictable, and informative. All in all, totally worth reading, especially for middle and highschoolers but great for adults as well. I usually like romance books but I really enjoy Andrew Varga’s series. He writes so well & everything flows together perfectly. Can’t wait to read the rest of the series! Highly recommend the whole series. You’ll really enjoy it and you’ll feel smarter for having read it! It’s a win/win!
*I received this book at no charge & I voluntarily left this review.*

Learning history and having it brought to life so vividly are my favorite aspects of these books, and The Spartan Sacrifice did not disappoint! I got emotional a few times during inspirational speeches, kind gestures, character deaths, etc. The writing really sucks me into the story.
The romance and Dan's inconsistent intellectual reasoning are my least favorite parts of the books. They're largely realistic depictions, but they make me cringe with either how awkward the romantic bits can be or how implausible some of Dan's deductions or lack thereof can be. I think these may be acceptable to the target demographic (younger readers), as I'm in my 40s so not really who these books are for! I still enjoy the overall premise and especially the history lessons, even though these aren't aimed at me as the audience.

I liked this installment of the jump in time series, I enjoy greek history in general and getting to see Leonidas in one of these novels was a lot of fun, I liked the extra twists and turns that happened, in a lot of the other books they're straight forward and not as twisty, but I liked what the author did. It hooked me and made me want to know more about the time jumper brotherhood, and what Victor was doing! Can't wait for the next I'm really excited to see. With each book it honestly gets better.

I very much enjoyed the spartan sacrifice though admittedly less so than the others in the series. My primary reason for this being that the book seemed to focus more on relationship development, which in itself would have been fine, but I felt like the characters underwent this development already and were redoing the same thing over again, particularly involving Sam. There were a few small things that the absence of in previous books leads me to wonder if the publisher made some requirements.

Still the book is vastly superior to the vast majority of young adult fiction these days. Certain parts of the stories such as Dan’s “come and take it,” molon labe line and Dan being given a linothorax, I was particularly excited to see. I do feel like the author should note, to match more the historical accuracy of the rest of the texts, that no matter how awesome it looks, I can say from experience that you cannot break arrows of a shield easily, most certainly not several in one stroke. Overall I enjoyed it and would recommend it to others.

Another brilliant instalment by Andrew Varga.
This one got me emotional very early on because it took me back to an ancient history class that I loved when I was 11 years old. Just like Dan becomes giddy after realising he is seeing some of his heroes, I was almost choked up.

It was a good book with some interesting twists: some unexpected, while others strongly foreshadowed (especially the big stuff at the end).

I love the writing style. It is friendly and accessible, keeping me entertained, helping me visualise what is happening, with a good mix of descriptions and dialogue. The suspense is provided in a perfect amount for my taste.

I am really curious how Dan will navigate his way out of the hole he dug himself into. I can see a few possible events, and I cannot wait to read the fifth book.

The sense of mystery is perpetuated. While some questions are answered, more arise. The characters are fairly believable, neither one-dimensional, nor too complex to take away from the interesting plot.

It was fascinating to learn more about Victor's evil plan. Listening to people who believe in it can be very polarising. It makes me reflect on how people in the real world start to have extreme views. This, combined with some of Dan's choices, can really question the readers' ethics and morals.

There is also a level of complexity brought by the fact that the bad guys want to fix the time stream, while also making small changes (addressed by the plot to be of "little consequence") as well as trying to take huge action in the present. I wonder if they fear a chrononaut to visit from their future to fix what I can only describe as the glitch they are setting up. But maybe there is no glitch cause Dan will stop them anyway.

The time travel element is interesting. It is a tool for an interesting story. I advise readers again to not become obsessed about time travel being written "the right way". There is no right way because, as far as we know, time travel is not possible. The only right way of writing about it is to set it up in a way that stimulates readers' imagination. And mine is stimulated. Having said that, the approach used in this series treats time both as a thing that can be revisited, but also as a linear concept with events being visitable only once. If the glitch isn't fixed when it should, the chrononauts cannot try again by jumping back in time repeatedly.

Happy reading!

Dan's latest jump takes him all the way back to ancient Greece, days before the famous Battle of Thermopylae.

With the stakes higher than ever and Dan questioning the lengths he can go, he and Sam are deeper and deeper entangled in Victor Stahl's net.

As the story progresses, some missing puzzle pieces of the overarching plot are falling in place, but said plot doesn't appear particularly well thought and has several huge holes in its reasoning.

This can be overlooked though since the series has a light adventure vibe from the start - what cannot be ignored for me 4 books in, is the cringe, cheesy teen love triangle plotlines. The less said about this, the better. It does a huge disservice to the series.

Thank you NetGalley for the ARC!