A personal favourite!!
It has been a really long time since I have read a sci-fi book of this calibre, and I was pleasantly surprised by my find. I am so glad I chanced upon this book. There seems to be not one, but two particularly significant sci-fi mentions in the book I would love to talk about. First, is the SCR, which is closely reminiscent of Dyson's sphere and Alderson's disc; and truth be told, you did a great job at the explanation! The author has handled the subject with outstanding discretion. Then is the time-travel part- As a devoted space-time travel aficionado (And also someone who writes particularly on this genre), I was so happy to find real-science parallels in the book. Not only was time travel touched, but also 'space-time' travel, with the teleportation ploy mentioned in the book, something that majority of the authors ignore.
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The characters are well developed, and all the major science facts explained with such dexterity and precision, that I was so engrossed in the plot and it took me just one sitting to complete the book. Also the fact that the author has created such a diverse world, in just 22 chapters is noteworthy and a literary feat! The plot is inexplicably magnetic and combined with the author's literary prowess, the book is nothing short of a must-read!
Easiest five stars I'll ever give.