Bryan asked:

Has this book ( or any of the subsequent 3 Zach Walker books) ever been published in the UK? my local library, which is extensive, could not trace a copy for me.

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Asteropê Kindle edition is listed on Amazon UK - https://www.amazon.co.uk/Bad-Move-Zac...
Looks like for the Kindle edition, pub date is: 10 Aug. 2017

#2 Kindle edition - https://www.amazon.co.uk/Bad-Guys-Zac...
pub date: 7 Sep 2017

#3 Kindle edition - https://www.amazon.co.uk/Bad-Luck-Zac...
Pub date: 5 Oct. 2017

#4 Kindle edition - https://www.amazon.co.uk/Bad-News-Zac...
Pub date: 2 Nov 2017

Looks like the UK is just getting this series in ebook form. You might be able to buy used physical copies of other editions. I don't know if the publisher (Orion) plans to have physical copies eventually or not, but you can get the ebooks this year.

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