Clearly tell the book title and author. It's best to repeat this both at the beginning and the end. For picture books, also tell the name of the illustrator.
Find a "hook" - a scene, event, or circumstance that will intrigue your readers, show them what's special about the book, and make them want to know more.
It could be a question
It could be the first line or paragraph of the book - if it's a grabber.
Add a personal touch...
something to make the talk yours.
also, let the readers know how the book relates to them.
Choose a voice
You can comment on the book,
Or, for fiction books, you can become one of the characters (this works best if you like to act)
Don't tell your readers that the book is a great book...
Demonstrate that it is by what you tell about it.
Never, ever, ever give away the end of a fiction book
Make your audience want to read it to find out the end.
This may also apply in nonfiction books that tell a story.
Be well prepared.
You don't need to memorize, but you have to sound natural. Don't sound like you are reading from a script. If you are recording for an online booktalk, you can read as long as the script isn’t visible and you make it sound like you aren't reading. •
Keep it short.
One minute is probably a good average length for a recorded talk.
For live book talks, you might make it is a little longer, especially if you ask questions and get answers from your audience, but two minutes should be about the longest. •
For a recorded book talk that will be online:
Tell your first name only
Get your parents' permission
Do prepare a script you will read. Go over the script enough times to make it sound as if you aren't reading.