Recently, I took advantage of this new technology to republish my out-of-print Echorium Trilogy and the Seven Fabulous Wonders series as ebooks, and now Amazon has made it even easier to find the missing parts of a beloved series by neatly listing the books together on one page of their site. If you're missing any of mine you can complete your collection here:
(I can't find a neat Amazon page yet for my Pendragon Legacy series, but when I do I'll add that here.)
Meanwhile, I am eager to complete my collection of a brilliant Anne McCaffrey series about sparky heroine Killashandra Ree, which began with The Crystal Singer - a book I first read years ago and often turn to when I need a comfort read, which means my battered old paperback copy is now falling apart at the seams...
Which much-loved series are YOU keen to complete?