Need HELP with Beatles Autograph

Found this book yesterday at a thrift store. Signed Peanuts sketches throughout the book as well as an autograph from British Actor, Albert Finner, an inscription from Julia Lennon, who was John Lennons mother, and TWICE signed by all members of the Beatles.
Is there anyone out there that could give me some insight on the possibility of all these signatures being real?
I have looked at many examples and I have to say they definitely vary through the years but these look really similar if not exact to others I have found.
The book was published in 1958 which is the year John Lennons mother died.
Any help with this from a KNOWLEDGABLE person is greatly appreciated.