Read the following paragraph and determine if the hypothesis is true:

The Warlock in Spite of Himself is a science fantasy novel by American author Christopher Stasheff, published in 1969. It is the first book in "Warlock of Gramarye" series. The title is a play on the title of Moliere's "Le Medecin malgre lui" ("The Doctor, in Spite of Himself").

Hypothesis: The second book of the series was published in 1972.
It's impossible to say