I've been thinking about my old books and reprinting them again. I worked out how to do it. My plan is to assemble books 1&2 into one volume, and 3&4 into a volume when 4 is out of print. I can't assemble 1, 2 and 3 together for fairly obvious format reasons.
It's difficult to gauge demand for reprints like this and the books would be, due to their 400+ page counts, more expensive to produce than my usual books, which means more cash up front. But I do feel like it would be responsible of me to put them into print again - I think I frequently lose sight of the fact that someone might have discovered my old work last week, to them it is engaging and new.
I can't start looking at this until the last of the Scary Go Round books has broken even, as that is where all my money is right now. Maybe I should apply for an Arts Council Grant! But I think the Arts Council frown upon rascals like me.