The Series
Invoking Infinity is the first novel in the Archivist series, which is set in the same universe as the Dowser, Oracle, Reconstructionist, Amplifier, and Misfits of the Adept Universe series.
While it is not necessary to read all the series, in order to avoid spoilers the ideal reading order of the Adept Universe begins with Cupcakes, Trinkets, and Other Deadly Magic (Dowser 1).