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What lies beneath this planet of mystery?

Roy Boss had it made. He had three sexy monster girls and two cute baby girls, and he murdered the hell out of the guy who stole his company. The only thing left to do was to go back through the stargate and take back his property… or at least that’s what he thought before the gateway to the planet’s underworld swung open.

The revelations of the deep dark are astounding: the birth of the Pelerine, the secrets of the Coptics, and the arrival of the UnWolf. But by learning the secret histories, Roy has drawn the attentions of an ancient foe. He’ll have to level up, gather more resources, and print his own army of monsters, or the planet of Plymouth will die a second time—and this time, the future of the Milky Way Galaxy might perish with it.

From Aaron Crash, bestselling author of Barbarian Outcast and the American Dragon series, comes a brand-new world that will leave you turning pages late into the night.

Disclaimer: Master Build is an explicit sci-if harem adventure. There are girls, guns, and sex on the page. Each of Roy’s monster girls is fully configurable when it comes to bedroom activities. It's like a smutty I Am Legend meets Westworld. You have been warned.

270 pages, Kindle Edition

Published December 3, 2020

113 people are currently reading
39 people want to read

About the author

Aaron Crash

66 books313 followers

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5 stars
95 (62%)
4 stars
33 (21%)
3 stars
17 (11%)
2 stars
7 (4%)
1 star
1 (<1%)
Displaying 1 - 12 of 12 reviews
60 reviews3 followers
March 17, 2021
This just felt like a letdown to me after coming off the high point of the first book. I think this would have made a better first book in the series but since it is the second I can only feel meh about it. Plus I can't put my finger on it but I can't go more than a few minutes listening to the audiobook before I get so frustrated that I have to turn it off, which is weird since I really like Tess Irondale as a narrator but this story doesn't do her justice.
Profile Image for Lana.
2,794 reviews60 followers
December 3, 2020
Roy Boss had lost his gaming business Venture Forge, back on earth and had found himself on the far off galaxy known as Plymouth where he could print out his monster girls thanks to his old friend now just an AI on a monitor called Halcyon. He intended returning to earth to take back his business from the traitors who stole it from him, however first he had to make his home safe for his family. He had 3 sexy as hell monster girls and two cute baby girls from the spider queen. He had also murdered Ennis Tolliver but his life was far from easy. He was still being hunted by an ancient foe who was as cunning as hell, and could not only print out as many monsters as he wanted but also make use of the dead, who he then proceeded to use against Roy and his family. Who was the Unwolf? and how had the Pelerines, a whole new race of people been wiped clean off Plymouth? I just love Toxy the spider queen, with her demands for minions, Tails the hellfox girl who was kindness itself, Joey the panther goddess even though at times she could not be trusted and Chrissie the new girl on the block but most of all I love the cute little babies Arra and Nida who had become the focal point of Ray's family life and who all of them would give their lives to protect. This is an action filled harem novel for a mature reader who is not squeamish about sex and gory battle scenes. It is also a book about family and love and loyalty which I really enjoyed reading and hope to read more about in the next book!
235 reviews3 followers
December 24, 2020
A Fabulous Adventure!

These stories of Roy and his haram of manufactured Monster Girls. Are a fantastic series to read. Every book including this book. Aaron Crash's writing style and the characters he creates. Really hits my the style of humor. There isn't a single chapter in this book. That I don't laugh several times. While I'm reading it. Keep writing Aaron and I'll keep reading and enjoying your books. Which I'll write great reviews for them. Happy Holidays everyone 12/23/2020.
1,486 reviews15 followers
December 6, 2020
A really enjoyable series!!!

This series just gets more and more entertaining!!! First rate characters, with awesome interaction!! A great blend of fantasy and science fiction, without losing either in the mix!!! Readers you absolutely can't go wrong reading any of Aaron Crashes books!!!!
Profile Image for Scott.
1,491 reviews12 followers
December 8, 2020
Good jump in quality

A nice jump up from book 1 as we get mkre girls, enemies and more answers finally.
This is the most sex driven story yet from crash i think but it seems to fit into the story narrative quite well without losing too much of the other action.
Looking forward to book 3
14 reviews
March 16, 2021
Monster wife's are hot

Roy and his monster wife's is a hot and amazing story about a man who didn't know he wanted a family but definitely wants his company back. This book was a roller coaster ride in a D&D dungeon / monster girl porn factory which equals
A badass ride Enjoy I did .
Book 3 I know is going to be even better
562 reviews7 followers
December 8, 2020
Merry Christmas monster lovers

Truly an epic piece of sci-fi harem action adventure! Following the adventures of Roy Boss will keep you on the edge of your seat with this fast and fun tale.
Profile Image for Jamie Ross.
851 reviews14 followers
December 21, 2020
Loved every second!

A masterful blend of apocalyptic, science fiction and GameLit with a bunch of gorgeous Monster Women, an alien world, mysteries and Masterful villains.
If the first book was brilliant, the second is genius.

Can't wait for the next one!
Profile Image for Aaron Eichler.
789 reviews
May 2, 2021
Interesting story

There was less sex than the first one, and more battle which I like. I am going to read the next book too. I hope they find other people, since Boss is the only guy on the planet.
Profile Image for Caleb.
92 reviews1 follower
October 2, 2021
I enjoyed the novel, I think that the main conflict of the novel was a little disjointed but good to wrap up in this book. I mostly really enjoyed the author's expiration of an alien race and how they were able to evolve on their planet and develop their unique technology.
Profile Image for tester.
380 reviews1 follower
February 4, 2025
couldn't finish this one sorry, when ever they talk about "creating s*x slaves" I just cringe.
Displaying 1 - 12 of 12 reviews

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