Seven, John

When twenty-fifth century time-travelers Dawkins and Hypatia find a plastic artifact among the Neanderthals, it is an anomaly--but on their next assignment to Japan in 1595 they find much more significant evidence of tampering, using virtual reality to induce belief in a demon tengu, and causing mass hysteria.

Their latest adventure takes teenagers Dawkins and Hypatia back to thirteenth-century Nottingham and Sherwood Forest, but when they find a time-traveling device in a cave they find themselves far in the future--and closer to the forces that are tampering with time.

When twenty-fifth century time-travelers Dawkins and Hypatia find a plastic artifact among the Neanderthals, it is an anomaly--but on their next assignment to Japan in 1595 they find much more significant evidence of tampering--using virtual reality to induce belief in a demon tengu, and causing mass hysteria.

Their latest adventure takes teenagers Dawkins and Hypatia back to thirteenth-century Nottingham and Sherwood Forest, but a time-traveling device found in a cave sends them far into the future--and closer to the forces that are tampering with time.

In Rome during the time of Vespasian, time travelers Dawkins and Hypatia Faraday join up with Pliny the Elder who is researching dragons for his natural history encyclopedia, which seems like a harmless activity until a real fire-breathing dragon attacks them.

Living in the twenty-fifth century, young Dawkins and Hypatia Faraday take time travel and technology like the NeuroNet for granted but in Prague in 1648, they are startled to find a rogue alchemist who is using advanced technology to change mercury into gold.

Friends celebrate the seasons and enjoy activities through the months of the year.

In Rome during the time of Vespasian, time travelers Dawkins and Hypatia Faraday join up with Pliny the Elder who is researching dragons for his natural history encyclopedia, which seems like a harmless activity until a real fire-breathing dragon attacks them.

Living in the twenty-fifth century, young Dawkins and Hypatia Faraday take time travel and technology like the NeuroNet for granted but in Prague in 1648, they are startled to find a rogue alchemist who is using advanced technology to change mercury into gold.

Relates the story of the oceans that are home to so many creatures, that are part of the water cycle which produces rain, and that can become very messy if we do not take care of them.