Mike has a number of works available from the Lulu print on demand site:

Child of Pure Harmony: a sourcebook for the single-Action Harp

Georgian Miniatures. A selection of 12 short pieces for single-action pedal harp, but equally worth playing on the modern instrument

Late Georgian Country Dances, for harp, or pianoforte. 12 dances, with steps, as originally presented in period sources, and dating from between 1810, and c. 1816.

Lorenz Sonata no.1 for hook harp and violin: Written for the hook harp, this duo sonata works equally well on pedal, or lever harp.

Sonatina in C: A short, easy work designed to introduce early stages students to the concept of the sonata.  Only one movement requires a chromatic shift, the others can be pre-set at the beginning of the movement. Accessible, and pretty, it makes a useful exercise, but is also worthy of performance.

Andante con Varazione by J E Weippert. No chromatic shifts requited once the key is set, so playable on pedal, or lever harp

Mike also has a number of works available  with Creighton’s collection