Books in The History Keepers series
Style: Weak → Average
Attitude: Unobjectionable → Fairly Positive
Jake Djones is caught up in the work of the Bureau of History Keepers when his parents, who have secretly worked for them all these years, disappear while on a mission.
Inoffensive if uninsipired. Time-travelling family & friends with minor heroics against dastardly villains.