The book is  Koka Shastra: Being The Ratirahasya Of Kokkoka And Other Medieval Indian Writings On Love By Alex Comfort .
The Book has 176 Pages and the one at archives  for which you have given the link has 146 pages.  I Suppose The introductory and cover pages are missing..

The complete  book is available to borrow and read at archives.org 
The Koka shastra; being the Ratirahasya of Kokkoka and other medieval Indian writings on love : Kokkoka, 8th cent : Free Download, Borrow, and Streaming : Internet Archive
Regards
Ajit Gargeshwari

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न जायते म्रियते वा कदाचिन्नायं भूत्वा भविता वा न भूयः।
अजो नित्यः शाश्वतोऽयं पुराणो न हन्यते हन्यमाने शरीरे।।2.20।।


On Thu, Jun 16, 2022 at 8:58 AM Yang Qu via INDOLOGY <indology@list.indology.info> wrote:
Dear List Members,

Greetings!

I wonder if anyone could kindly provide me with more information about this particular translation of Ratirahasya (Kokaśāstra)?

https://archive.org/details/in.ernet.dli.2015.219313/page/n3/mode/2up

Neither its translator nor publishing place is indicated in the document, and it's clear that it's not the translation of either Alex Comfort or S. C. Upadhyaya. I would really appreciate it if anyone could kindly shed some light on this.

Thank you so much!

best wishes,
Yang Qu

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