Lidia's calligraphy should be impressive...not scary!
It is recommended to select "Publisher Fonts" or "CSS Font Families" within your e-reader options screen - but it is not absolutely critical. The book can be read as is - it is just not quite as personal to read Lidia's calligraphy when it looks like a ransom note!
In a few critical spots of Finding Shelter from the Storm, Lidia leaves either notes or letters written in Calligraphy. This same font is all over this website - it is Google Tangerine.
If your using a reader on Android - or an Apple reader other than Ibooks - sometimes you have to select an option to use "Publisher Fonts" or CSS Font family (it varies by reader).
It sounds scarier than it is.
You'll know right away...if the first chapter looks like the first picture then try changing the e-reader options.
If it looks like This: then you're good to go.
I embedded the fonts correctly within the Style Sheets according to Epub convention - it does work. If you are having problems--please don't hesitate to reach out.