A nice touch in this activity book is the envelope for storing finished pages.
A Complete Handbook for the Hospital Corps of the U.S. Army and Navy and State M
You will find that this activity book has a good balance of easy and hard puzzles.
A nice touch is how every chapter includes a full-page illustrated scene.
You will find that the illustrated diagrams explain things clearly.
With this activity book, you can learn about animals while solving puzzles.