Princeton Architectural Press has added two new products to their popular Grids & Guides series of tools for visual thinkers. The Grids & Guides Drawing Pad is a large-format drawing pad for the desk, drawing table, job site, or on the go. Fifty pages of extra-large graph paper are bound to a black board and perforated for easy tear out. Each sheet of classic blue graph paper offers more than 100 square inches of space to draw and sketch your next amazing idea. $16.95 Also new from PAP is the Grids & Guides Tracebook set, which includes two notebooks filled with 60 pages of tracing paper. The cover flaps fold inside the book, providing handy structure for sketches, designs, or lists. Remove the flaps, and the design remains, while the grid disappears. The tracing sheets are also perforated. $18.95 All images courtesy of Princeton Architectural Press.