[im_a_ninja]

Here is my dilemma. I am starting back to class Aug 13th.
I am taking 4 classes....2 of which are biology and medical microbiology. The text books aren't light.

I need a way to carry those books to school.
It just seems unsafe to strap those to my back so I'm thinking a tail bag might be best.

Does anyone here actually ride their ninja to school with significant books...and if so which bag do you use?
I was hoping to find a bag that converts to a backpack too.

I love the tank bags that have straps but they aren't big enough for books.
I'm very skeptical of ordering things online unless I've seen them or someone else uses them.

I just read about 400 posts about bags here...but I failed to see anyone mention carrying school books in a bag. Sorry if this is a redundant post.