You can find the book here on amazon! It seems to be a mockup of some actual X Files from the show.
It’s currently sitting in my basket! Here is the link to UK Amazon, just in case… https://www.amazon.co.uk/gp/product/1419735179/ref=ox_sc_saved_title_1?smid=A3P5ROKL5A1OLE&psc=1
There is an official licensed poster that is easily available - I have one and it’s great.
There are lots of x-files action figures on eBay.
I’d recommend this book X-Files Official Archives
I’d search eBay for the funko pops too.
It’s a book I want to get but haven’t yet.
www.amazon.com/dp/1419735179/ref=cm_sw_r_cp_api_i_TPJZE6JWMKSZ90MA1X2Y
You can get it on Amazon!
The X-Files: The Official Archives: Cryptids, Biological Anomalies, and Parapsychic Phenomena https://www.amazon.com/dp/1419735179/ref=cm_sw_r_cp_api_i_0JSF90VFMMEMHZDNNJPW
A quick search of the title on the book in the photo:
https://www.amazon.com/dp/1419735179/ref=cm_sw_r_u_apa_fabc_pQQ5FbJW9YQEC
New X-Files cannon book. It's really cool.
https://smile.amazon.com/gp/product/1419735179/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
X-Files: The Official Archives: Cryptids, Biological Anomalies, and Parapsychic Phenomena https://www.amazon.com/dp/1419735179/ref=cm_sw_r_cp_api_i_gCbBFbHMQB92Z