Start with high-confidence handwriting books, then narrow by subgenre or adjacent topics.
Big Preschool
School Zone, Joan Hoffman
Big Kindergarten Workbook
Brain Quest Workbook: Pre-k Revised Edition
Workman Publishing, Liane Onish
Brain Quest Workbook: Kindergarten Revised Edition
Workman Publishing, Lisa Trumbauer
Brain Quest Workbook: 1st Grade Revised Edition
Thinking Skills
Preschool Big Fun Workbook
Highlights Learning, Highlights for Children
Preschool Paper Crafts
Stefania Luca
My Kindergarten Workbook
Brittany Lynch
My First Learn-to-write Workbook
Crystal Radke
The Summer Before First Grade Workbook
Gold Stars
Learn to Read Activity Book
Hannah Braun M.Ed., Hannah Braun
My First Book of Patterns Pencil Control: Patterns Practice Book for Kids (pattern Writing)
Wonder House Books