How to copy auto-increment id value from one table to another?
Your schema doesn't even make sense. You need to have an authoritative bookid somewhere.

CREATE TABLE book (
  bookid  serial PRIMARY KEY
  -- stuff
);

CREATE TABLE book_title (
  bookid  int REFERENCES book,
  title   text
);

CREATE TABLE book_price (
  bookid  int REFERENCES book,
  price   float
);


That said, if everything is 1:1 with book, just put it all on the same table. You don't need a separate table for every column:

CREATE TABLE book (
  bookid  int serial,
  title   text,
  price   numeric(10,8)
);