I FOUND IT!

I have finally found the book: World of Science & Mystery - Monsters by CHILDREN'S BRITANNICA. I thought I had lost this book that I describe in my September 2019 post: 7 BIGFOOT THEORIES. I wrote; "I saw a picture of a Plesiosaur* in a school-book when I was 10 years old. I can't remember the name of the school-book "Mysterious Monsters" (something like that)" Like I said I thought I lost this book but I am now delighted that I have found it.

To clarify, this 32 page book is not actually called Mysterious Monsters, it is titled: World of Science & Mystery - Monsters by CHILDREN'S BRITANNICA and I highly recommend it to everyone. On the front cover there are 4 pieces of information:

1. Mysterious footprints
2. Hunting strange beasts
3. Undersea creatures
4. Scaley-winged dragons

The dimensions of the hardback book are:
22.2 cm or 8 and ¾ inches in width
28.5 cm or 11 inches in length

A picture of me holding the book -