One of the very best books that exist for me.
I took it with me on holiday and leafed through it countless times.
I've been through thick and thin with it, cried together and also laughed. Proved himself against the less knowledgeable and gradually rose to the occasion. Learned things by heart and forgot them again.
Thank you, my friend, for 14 years. You will be dusted regularly.
Compared to edition 44, edition 43 still had the "Euler's critical load" in it. Not unimportant at all, but probably not important enough to take up half a page in this great reference work. I don't know what the current edition looks like.