Evil Inheritance

In Evil Inheritance, Mattias, a good-hearted grandson of Silje and Tengel inherits the vast, secret collection of Ice People medicines and formulas, including an all-powerful mandrake root. But the ominous Kolgrim wants the collection for himself and lures Mattias to a meeting in the depths of the infamous Kongsberg silver mines where slave children are forced to work without any hope of release. Kolgrim escapes with the collection of balms and potions and returns to the high Valley of the Ice People in search of a vital cauldron of evil water...
Margit Sandemo
Margit Sandemo (1924-2018) was a Norwegian-Swedish historical fantasy author. She had been the best-selling author in the Nordic Countries since the 1980s, when her novel series of 47 books, The Legend of the Ice People, was published. She also wrote many other book series such as Häxmästaren and Legenden om Ljusets rike.
Photo source: Wikimedia Commons.
The Legend of the Ice People
Series contains 6 primary works and has 6 total works. Current series reading order on below.