Humble Bundle offers downloads of its Humble Learn Raspberry Pi and Arduino eBook Bundle for whatever you want to pay. If you opt to pay the bare minimum of $1, you'll get Make: Raspberry Pi and AVR Projects, MintDuino: Building an Arduino-compatible Breadboard Microcontroller, Make: Getting Started with Adafruit Trinket, Make: Getting Started with Adafruit FLORA, Make: Making Simple Robots, and Make: Arduino Bots and Gadgets. That's $57 under the lowest price we could find for universally-compatible digital copies of these books elsewhere. They're available in PDF, ePUB, and MOBI formats. Coupons for $10 off print and $5 off digital Make magazine subscriptions are also included.
These tips and tools can help you recoup thousands of dollars if the unthinkable happens.