Kobo has the second book in Anne McCaffrey's Freedom/Catteni series on sale for $1.99 Cdn as does Amazon.ca. Probably also elsewhere on Kobo and Amazon.
Kobo Canada - Freedom's Choice by Anne McCaffrey Freedom/Catteni #2
Amazon Canada - Freedom's Choice by Anne McCaffrey Freedom/Catteni #2
I read the first 3 books in the series decades back in paperback. I never got around to reading
Freedom's Ransom which was the 4th book in the series.