You may consider appealing to a deity or deities that have a connection with creativity and inspiration.
Perhaps use the creative process itself during spellbook? By this I mean if you draw perhaps utilize drawing in the spell itself. Perhaps drawing up some very inspiring sigil, or if you write music, Writing your own ritual music.
I remember trying to electronically make my own ritual music. I used small decorative spoons I had and a couple altar chalices.
It was really fun to do.
From the information you provided my best advice is to relax and have a bit of fun with your spellbook.