I adored The Portable Door years back and have been periodically checking for the ebook; Kobo now has it, and very cheap. I have heard that the sequel (In Your Dreams) is worth picking up too, but people seem to be of mixed opinions of the others in that series, and I have not read any of Holt's other stuff. Are the other two in the series worth a read? And how about recommendations for any of his other work?
Fwiw as far as other stuff in this genre goes, I loved the Douglas Adams books and adored Good Omens by Pratchett and Gaiman---but I was lukewarm on Pratchett and Gaiman's other stuff. Mort was good, but most of the other Discworld books I sampled struck me as being in the vein of trying just a little too hard
