The Happy Science Geek Notebooks and Gift Ideas

titleISBN-13year of publication
Mathematical Problems Book: Notebook for Mathematics Math Genius 6x9 in dotted978-1-0710-3994-62019
Mathematical Problems Book: Notebook for Mathematics Math Genius 6x9 lined with lines978-1-0710-4423-02019
Millenium Prize Problems Book: Notebook for Mathematics Math Genius 6x9 in dotted978-1-0710-3993-92019
Millenium Prize Problems Book: Notebook for Mathematics Math Genius 6x9 lined with lines978-1-0710-4425-42019

H.G. · H.S. · S. G. · T.H. · T.S.

The Harbus