Bedknobs and Broomsticks Series by Mary Norton

An engrossing fantasy about an elderly woman who practices magic for a hobby and three London children evacuated to the country during the bombing of London.This story was later republished, together with Bonfires and Broomsticks, as Bedknobs and Broomsticks.

Three children and a friendly witch are transported into the seventeenth century and bring a confused sorcerer back to the twentieth century with them.

In The Magic Bedknob, Carey, Charles and Paul 6 find prim Miss Price injured by falling off her broomstick. For their silence, she bespells a bedknob to carry them where-ever and when-ever. In Bonfires and Broomsticks two years later, they bring necromancer Emelius Jones to visit. But his neighbors want to burn him at the stake for disappearing in the Great Fire of London.