Should i read the 12th book from the spook's trilogy by joseph delaney without reading the others?

[Arbaaz]

I guess the title sys it all.

[Jawad]

i assume your talking about iam alice since that is the 12th book of the series and to answer your question i would strongly advise against reading the 12th book without reading the previous 11 since many things would not make sense and most of Alice's character development would make no sense to you. Theirs also a 13th book which is the last of the series which btw is not a trilogy and the author already stared a sequel series called the star blade chronicles after he ended this series :)
Hope this answers your question for any further queries you can PM me if you want.