Cannot Craft Gunnery Encyclopedia - Missing Book that is in Inventory

[Christendom]

So I have all 4 Books - 

 

And this is happening while trying to craft

 

what. the. frick.

[Barbancourt]

Happened to me as well.  f11 it

[Corona Lisa]

Hover over Horizon Ballistique. Does it say skill knowledge book?

[Milkman van Swallows]

Yeah is it a book? Or is it a regular upgrade, there is quite a few of them going around. Afaik, if you get in touch with devs you get it replaced.

[Ink]

Also, was it redeemed from PVP Global assets?

[Ink]

The book will be replaced tor correct one