devtrackers.gg
Hello sir,
first, welcome to Tarkov!
Second, we have a special thread where you can find the materials that we created about the lore of the Escape From Tarkov universe - Russia 2028, you can find in the link below:
https://forum.escapefromtarkov.com/forum/26-russia-2028-lore/
Also there is a book, which story is set in Tarkov, it is called "PREDATOR", you can buy it on our page:
https://www.escapefromtarkov.com/book-page
The second book called "Voice Behind" is being translated to English currently.
I hope I helped you a bit, to me it was very interesting to read all the articles when I first heard about EfT and I hope you will enjoy it too! 
Also, EfT's main mode will be story-driven, you will find out all about the Tarkov story during it. 