This is a Tesco exclusive book published by DK books for Tesco to give away free when the Force Awakens was purchased from them, that promo is over & obviously they have a few left, so they've give it a rrp of £4.99 & are selling it for 50p delivered.
It actually has decent reviews & is hardback, for 50p del, think it's worth a punt
Get ready to become a Star Wars ace! From Jedi to Sith, rebels to Imperials, clones to stormtroopers, lightsabers, vehicles and droids - this brilliant book is jam-packed with facts about Star Wars. Includes exciting new characters from Star Wars: The Force Awakens.