Found 2 books

Algebra

[de] Algebra Springer Spektrum

Karpfinger, Christian & Meyberg, Kurt

download read it!
Terror at the Crossroads

[en] Terror at the Crossroads Penny Publications, LLC

Jackie Sherbow, Emily Hockaday & Brin, David & Kelly, Paddy & Nevala-Lee, Alec & Frost, Seth & Bowden, Rachel & Reed, Kit & McIntosh, Will & Half, Jason & Arkenberg, Megan

download read it!