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Can You Solve the Murder? 2 - by Antony Johnston (Paperback)

An Introduction to Phase-Integral Methods - (Dover Books on Mathematics) by John Heading (Paperback)

Plan It, Test It, Solve It - by Nicole Gabor (Paperback)

Solving Past Mysteries - (Forensic Investigations (Pulse)) by Lucy Green (Paperback)

Ordinary Differential Equations and Their Solutions - (Dover Books on Mathematics) by George Moseley Murphy (Paperback)

Sumaya Solves the Shining Stars Problem - (Sumaya Solves It) by Aisha Ahmed (Paperback)

Partial Differential Equations - (Dover Books on Mathematics) by Avner Friedman (Paperback)

32 simple tricks for quick mental calculations - by Yakov Perelman (Paperback)

Spot & Solve: Agatha Christie - by Alessandra Santelli (Hardcover)

Shortcut to Ordinary Differential Equations - by Scott Imhoff (Paperback)

30-Minute Groups: Life Skills - by Elishia Basner (Paperback)

Calculating Chimpanzees, Brainy Bees, and Other Animals with Mind-Blowing Mathematical Abilities - (Extraordinary Animals) by Stephanie Gibeault

The Chocolate Spy (The Crime-Solving Cousins Mysteries Book 3) - by Shannon L Brown (Paperback)

Sumaya Solves the Snowy Day Problem - (Sumaya Solves It) by Aisha Ahmed (Paperback)

Sumaya Solves the Ice Thief Problem - (Sumaya Solves It) by Aisha Ahmed (Paperback)

Math Formulas and Equations for Students - by Peter I Kattan (Paperback)

Basic Linear Partial Differential Equations - (Dover Books on Mathematics) by Francois Treves (Paperback)

Randolph Solves the Mardi Gras Mystery - by Pat Hornsby Crochet (Hardcover)

The New York Times Will Shortz Wants You to Solve Crosswords! - (Paperback)

Ordinary Differential Equations - (Dover Books on Mathematics) by Morris Tenenbaum & Harry Pollard (Paperback)

Barefoot Books Stories from Around the World: 4 Tales of Problem-Solving and Wit