Superspy middle schoolers Ben and Erica must embark on mission to rescue Erica's grandfather, who was abducted from a remote Alaskan training facility.

Tim and his friends travel by land and sea, collecting treasure and defeating monsters as they go.

In 2041 on Moon Base Alpha, thirteen-year-old Dash must solve the mystery of how Lars was poisoned before the base loses oxygen, forcing the colonists to return to Earth.

"Lucy and her goofball brother Andy, two Neanderthal siblings living 40,000 years ago, take on a wandering baby sibling, bossy teens, cave paintings, and a mammoth hunt. But what will happen when they encounter a group of humans? Includes a special paleontologist section that helps to dispel common Neanderthal myths"--

"Sex Cells is the tale of scientific stonewalling, intrepid advocacy, and the still-pitched battle to get the scientific and medical world to recognize that women are not small men. Phyllis Greenberger has been working in the field of biological sex differences for more than 30 years, and she continues to be struck by the lack of understanding about this topic, even among medical professionals. After all, it's a fundamental aspect of human life: males...