Plumbaginous? Really?

Today, while attempting to learn Latvian, I found some very useful english words in my Latvian dictionary. I assumed that they didn't exist but apparently they do!!

plum⋅bag⋅i⋅nous
-adjective: containing graphite

plum⋅bif⋅er⋅ous

–adjective: yielding or containing lead.

un⋅put⋅down⋅a⋅ble
–adjective Informal. (esp. of a book or periodical) so interesting or suspenseful as to compel reading.

breast⋅work
–noun: Fortification. a defensive work, usually breast high.


And here it all is in a sentence:
The book on plumbiferous and plumbaginous breastwork is unputdownable.