Did I check? Oh yes, many, many times. The tekst was checked again and again. The examples, the photo’s. But I must say till the very last days I kept on finding little things, a komma, a dot ..... Book 2 is another story: the fingerings were checked and checked again but I am sure there must be slight irregularities.
What I will do is this: I will post all mistakes on this page, so you can rectify things in the books. I would appreciate it if you would communicate any error you encounter to me; however minuscule. We can then all look forward to a second edition (for our own students and musical children) in the future without anyglitches.
Thanks so much.