With apologies for the delay, here is a Lulu link to purchase Jim Aikin’s Inform 7 Handbook in paperback format.
I set the price so that there is £0 profit. You can confirm this on Lulu’s pricing page and using the following information: print book; A4 size; 317 pages; colour standard; 60# white; paperback; glossy.
Thanks @Jim_Aikin for agreeing to this. I’m sure that people will find it useful.