Fifty Lectures for Mathcounts Competitions (5)Sam Chen, Guiling Chen · First published 2011 · Latest edition 2016Open the Tome
Mathcounts Speed and Accuracy Practice TestsGuiling Chen, Yongcheng Chen · First published 2014Open the Tome
Algebra II Through CompetitionsYongcheng Chen, Sam Chen, Guiling Chen · First published 2013Open the Tome
Fifty Lectures for American Mathematics CompetitionsJane Chen, Yongcheng Chen, Sam Chen, Guiling Chen · First published 2012 · Latest edition 2013Open the Tome
Fifty Lectures for American Mathematics Competitions Problems Book 2Guiling Chen, Yongcheng Chen · First published 2013Open the Tome
Fifty Lectures for SAT and PSAT Math Volume 1Guiling Chen, Jane Chen, Yongcheng Chen · First published 2013Open the Tome
Fifty Lectures for Mathcounts Competitions (2)Jane Chen, Sam Chen, Guiling Chen, Yongcheng Chen · First published 2011Open the Tome