Sentence correct

Rayman55We shared our e-book with attendees of the event (which) we sponsored. and We are now pleased to say the e-book make it is now available to for download from our website. immediately

Thank you, teechr. Were there errors in my sentence? I typed
"immediately" as I want people to download the e-book ASAP. The sentence is from a marketing email.

You can say "for immediate download" if you like, but I really think "immediate" would be redundant in that sentence.

Thanks. I wondered if you thought it might be redundant because I typed "now". What I'm trying to say is that we gave the e-book to attendees of the event (which is named earlier in the email) and "now look what we've done - we' ve made it available for download. You can download it right now!"

We have sponsored many events, so that is why I put a comma before "which".

I would be

OK, try this:
We shared our e-book with attendees of the event which we sponsored, and we are pleased to say the e-book is now available for immediate download from our website.

Thank you. I am really grateful for your help, but I would still like to know about my original sentence. Getting feedback is the only way I am going to learn.

I thought "which" need a comma before it to make it clear that I am talking about that particular event. We have sponsored numerous events. I have now decided to name the event in that sentence.