Thomson, Sarah L

"When middle school puzzle-master Sam and history-whiz Martina win a contest for a summer trip across the United States, they soon discover that they've been drafted into something vastly more exciting. Joining Theo, the last descendent of an American icon, they begin an extraordinary adventure across national landmarks and natural wonders, following clues to find seven artifacts left behind by the Founding Fathers. Together, these historical artifacts are keys to unlocking Benjamin Franklin's greatest invention--a powerful secret weapon. Each of the artifacts is hidden and protected with puzzles, riddles, and traps. This has kept the invention safe until now. Gideon Arnold, dangerous descendent of the infamous Benedict Arnold, is on the chase!"--Back cover.

In Glacier National Park, middle school geniuses Sam, Martina, and Theo follow clues related to Thomas Jefferson as they tackle a new round of puzzles, riddles, and traps to find the next key left behind by the Founding Fathers, but Gideon Arnold, descendant of the infamous Benedict Arnold, is hot on their trail.

"When middle school puzzle-master Sam and history-whiz Martina win a contest for a summer trip across the United States, they soon discover that they've been drafted into something vastly more exciting. Joining Theo, the last descendent of an American icon, they begin an extraordinary adventure across national landmarks and natural wonders, following clues to find seven artifacts left behind by the Founding Fathers. Together, these historical artifacts are keys to unlocking Benjamin Franklin's greatest invention--a powerful secret weapon. Each of the artifacts is hidden and protected with puzzles, riddles, and traps. This has kept the invention safe until now. Gideon Arnold, dangerous descendent of the infamous Benedict Arnold, is on the chase!"--Dust jacket.

This book, in question-and-answer format, explores the age of the dinosaurs (200-65 million years ago) and features Seismosaurus, Microraptor, Tyrannosaurus rex, Maiasaura, Troodon, Velociraptor, Sauroposeidon, and other dinosaurs.

Kata, having spent nearly her entire life training to be a female ninja, is given a mission to assassinate a ten-year-old boy and finds herself trying to outwit and outrun a warlord's samurai and creatures who want her supernatural power.

"In this picture book about exploring the big snowy world, a tiny polar bear learns that she can be brave--especially with Mom close by"--Provided by publisher.

The flightless terror bird in ancient South America was a formidable hunter. Explains how terror birds lived, hunted, and how they might have died out.

A non-fiction early reader about the fearsome saber-toothed cat that lived sixteen thousand years ago in what is now California.

"When little monkey's curiosity causes her to slip and fall to the shadowy forest floor, she must evade a series of animals looking for lunch before she can return to her home in the trees."--OCLC.