Book Grabber with Smart stopper

#!/bin/bash

delay="1"

echo -n "Book Title:"
read title

title="${title// /-}"
mkdir "$title" || exit 1


if [ "$1" = "collier" ]
then
  #collier County Lib
  echo "Working with Collier County"
  p1="664x900+296+144"
  p2="664x900+960+144"
else
  #Amazon Kindle
  echo "Working With Kindle Cloud"
  p1="750x1023+200+43"
  p2="750x1023+960+43"
fi

#now using Smart ender
# let p=100
# echo -n "Number of Pages:"
# read pages
#
# let max="$(echo $pages+$p|bc)"

echo "5 seconds to get to book"
sleep 5

#stop when end is greater then 2
let end=0
while [ "$end" -lt 2 ]
#while [ "$p" -lt "$max" ]
do
  echo "Page: $(echo $p-100|bc)"
  import -window root -crop $p1 -quality 90 ${title}/page_$p.jpg
  let p+=1
  echo "Page: $(echo $p-100|bc)"
  import -window root -crop $p2 -quality 90 ${title}/page_$p.jpg

  xte "key Right"

  #after 10 pages
  #compare pages to determine end of book
  if [ $p -gt 110 ]
  then
    i1="${title}/page_$p.jpg"
    let l=$(($p-2))
    i2="${title}/page_$l.jpg"

    let v="$(/usr/bin/compare -verbose -metric mae "$i1" "$i2" "/tmp/bookd.png" 2>&1 >/dev/null | grep 'all:'| awk '{print $2}'|cut -d\. -f1)"
    if [ $v -gt 0 ]
    then
      let end=0
    else
      let end+=1
      echo "Page Match - $end"
    fi

  fi


  let p+=1
  sleep $delay
done