Gilbert Kaplan has updated his magnificent Mahler Album with six fresh photographs and several revised captions. There’s also a learned not on Mahler’s spectacles and Alfred Roller’s physical description of Mahler, in my translation.
The Austrian Theatre Museum has also expanded its Gustav Mahler in Wien to GM in Wien und München. Likewise unmissable, if you can find it. The publisher is Christian Brandstätter, but there doesn’t seem to be a web link.
And a book has appeared in Czech and English on the new monument to Mahler in Jihlava, the town where he grew up.