HELPP!!!!!!! NEED ADVICE ON A SERIES OF BOOKS IM WRITING!!!?

in my book the plot goes that my main character wakes up in a forest full of ash and is looking for the lost pages of her grandfather's writings that tells of a prophesy that a vampire warlord is planning a war to exterminate the human race. in the end of the book the prophesy comes true wich leads to the second book i am going to write.. SHOULD I USE A NEW PLOT IS MY QUESTION AND IF SO I NEED SOME EXAMPLES!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!…